fa.bianp.nethttp://fa.bianp.net/Sat, 15 Oct 2022 00:00:00 +0200The Russian Roulette: An Unbiased Estimator of the Limithttp://fa.bianp.net/blog/2022/russian-roulette/ <blockquote class="pullquote" style="margin-left: 20px"> <p> <q>The idea for what was later called Monte Carlo method occurred to me when I was playing solitaire during my illness.</q> </p> <p style="text-align: right;"> Stanislaw Ulam, <i><a href="https://www.goodreads.com/book/show/423246.Adventures_of_a_Mathematician">Adventures of a Mathematician</a></i> </p> </blockquote> <p> The Russian Roulette offers a simple way to construct an unbiased estimator for the limit of a sequence. It allows for example to …</p>Fabian PedregosaSat, 15 Oct 2022 00:00:00 +0200tag:fa.bianp.net,2022-10-15:/blog/2022/russian-roulette/statisticsnuggetsunbiasedNotes on the Frank-Wolfe Algorithm, Part III: backtracking line-searchhttp://fa.bianp.net/blog/2022/adaptive_fw/ <p> Backtracking step-size strategies (also known as adaptive step-size or approximate line-search) that set the step-size based on a sufficient decrease condition are the standard way to set the step-size on gradient descent and quasi-Newton methods. However, these techniques are much less common for <a href="/blog/2018/notes-on-the-frank-wolfe-algorithm-part-i/">Frank-Wolfe-like</a> algorithms. In this blog post I …</p>Fabian PedregosaFri, 26 Aug 2022 00:00:00 +0200tag:fa.bianp.net,2022-08-26:/blog/2022/adaptive_fw/optimizationFrank-Wolfebacktrackingline-searchstep-sizeadaptiveOn the Link Between Optimization and Polynomials, Part 5http://fa.bianp.net/blog/2022/cyclical/ <blockquote class="pullquote" style="margin-left: 20px"> <p> <br><i> <b style="font-style: normal;">Six</b>: All of this has happened before. <br> <b style="font-style: normal;">Baltar</b>: But the question remains, does all of this have to happen again?<br> <b style="font-style: normal;">Six</b>: This time I bet no.<br> <b style="font-style: normal;">Baltar</b>: You know, I've never known you to play the optimist. Why the change of heart?<br> <b style="font-style: normal;">Six</b>: Mathematics. Law of averages. Let a complex …</i></p></blockquote><a href='https://scholar.google.com/citations?user=93PAG2AAAAAJ&hl=en'>Baptiste Goujaud</a> and <a href='http://fa.bianp.net/pages/about.html'>Fabian Pedregosa</a>Fri, 27 May 2022 00:00:00 +0200tag:fa.bianp.net,2022-05-27:/blog/2022/cyclical/optimizationpolynomialsaccelerationOptimization Nuggets: Implicit Bias of Gradient-based Methodshttp://fa.bianp.net/blog/2022/implicit-bias-regression/ <p> When an optimization problem has multiple global minima, different algorithms can find different solutions, a phenomenon often referred to as the <i>implicit bias</i> of optimization algorithms. In this post we'll characterize the implicit bias of gradient-based methods on a class of regression problems that includes linear least squares and Huber …</p>Fabian PedregosaMon, 10 Jan 2022 00:00:00 +0100tag:fa.bianp.net,2022-01-10:/blog/2022/implicit-bias-regression/learning theoryimplicit biasproofsnuggetsOptimization Nuggets: Exponential Convergence of SGDhttp://fa.bianp.net/blog/2021/exponential-sgd/ <p> This is the first of a series of blog posts on short and beautiful proofs in optimization (let me know what you think in the comments!). For this first post in the series I'll show that stochastic gradient descent (SGD) converges exponentially fast to a neighborhood of the solution. </p> <script type="text/javascript" src="/theme/js/bibtexParse.js"> </script> <script type="text/x-mathjax-config"> MathJax …</script>Fabian PedregosaWed, 15 Dec 2021 00:00:00 +0100tag:fa.bianp.net,2021-12-15:/blog/2021/exponential-sgd/optimizationSGDproofsnuggetsOn the Link Between Optimization and Polynomials, Part 4http://fa.bianp.net/blog/2021/no-momentum/ <p> While the most common accelerated methods like Polyak and Nesterov incorporate a momentum term, a little known fact is that simple gradient descent &ndash;no momentum&ndash; can achieve the same rate through only a well-chosen sequence of step-sizes. In this post we'll derive this method and through simulations discuss its practical …</p>Fabian PedregosaTue, 13 Apr 2021 00:00:00 +0200tag:fa.bianp.net,2021-04-13:/blog/2021/no-momentum/optimizationpolynomialsaccelerationOn the Link Between Optimization and Polynomials, Part 3http://fa.bianp.net/blog/2021/hitchhiker/ <blockquote class="pullquote"> <p> <q><i>I've seen things you people wouldn't believe. <br> Valleys sculpted by trigonometric functions. <br> Rates on fire off the shoulder of divergence. <br> Beams glitter in the dark near the Polyak gate. <br> All those landscapes will be lost in time, like tears in rain. <br>Time to halt.</i></q> <br> </p> <p style="text-align: right;"> A momentum optimizer <a href="https://en.wikipedia.org/wiki/Tears_in_rain_monologue">*</a> </p> </blockquote> <figure class="fullwidth"> <img style="max-width: 1000px;" src="/images/2021/rate_convergence_momentum.png" alt=""> </figure> <script type="text/javascript" src="/theme/js/bibtexParse.js"> </script> <script type="text/x-mathjax-config"> MathJax.Hub.Config …</script>Fabian PedregosaTue, 02 Mar 2021 00:00:00 +0100tag:fa.bianp.net,2021-03-02:/blog/2021/hitchhiker/optimizationpolynomialsaccelerationmomentumChebyshevOn the Link Between Optimization and Polynomials, Part 2http://fa.bianp.net/blog/2020/momentum/ <p> We can tighten the analysis of gradient descent with momentum through a cobination of Chebyshev polynomials of the first and second kind. Following this connection, we'll derive one of the most iconic methods in optimization: Polyak momentum. </p> <script type="text/javascript" src="/theme/js/bibtexParse.js"> </script> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath …</script>Fabian PedregosaMon, 21 Dec 2020 00:00:00 +0100tag:fa.bianp.net,2020-12-21:/blog/2020/momentum/optimizationpolynomialsaccelerationmomentumChebyshevOn the Link Between Polynomials and Optimization, Part 1http://fa.bianp.net/blog/2020/polyopt/ <p> There's a fascinating link between minimization of quadratic functions and polynomials. A link that goes deep and allows to phrase optimization problems in the language of polynomials and vice versa. Using this connection, we can tap into centuries of research in the theory of polynomials and shed new light on …</p>Fabian PedregosaTue, 07 Apr 2020 00:00:00 +0200tag:fa.bianp.net,2020-04-07:/blog/2020/polyopt/optimizationpolynomialsaccelerationChebyshevHow to Evaluate the Logistic Loss and not NaN tryinghttp://fa.bianp.net/blog/2019/evaluate_logistic/ <p>A naive implementation of the logistic regression loss can results in numerical indeterminacy even for moderate values. This post takes a closer look into the source of these instabilities and discusses more robust Python implementations. </p> <!-- for highlighting --> <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.5/styles/default.min.css"> <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.15.5/highlight.min.js"></script> <script>hljs.initHighlightingOnLoad();</script> <!-- Mathjax--> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath …</script><a href='http://fa.bianp.net/pages/about.html'>Fabian Pedregosa</a>Fri, 27 Sep 2019 00:00:00 +0200tag:fa.bianp.net,2019-09-27:/blog/2019/evaluate_logistic/codinglogistic regressionnumerical stabilityNotes on the Frank-Wolfe Algorithm, Part II: A Primal-dual Analysishttp://fa.bianp.net/blog/2018/fw2/ <p>This blog post extends the convergence theory from the <a href="/blog/2018/notes-on-the-frank-wolfe-algorithm-part-i/">first part of these notes</a> on the Frank-Wolfe (FW) algorithm with convergence guarantees on the primal-dual gap which generalize and strengthen the convergence guarantees obtained in the first part. </p> <script type="text/javascript" src="/theme/js/bibtexParse.js"> </script> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax …</script>Fabian PedregosaSat, 17 Nov 2018 00:00:00 +0100tag:fa.bianp.net,2018-11-17:/blog/2018/fw2/optimizationFrank-Wolfeconditional gradientconvergence analysisThree Operator Splittinghttp://fa.bianp.net/blog/2018/tos/I discuss a recently proposed optimization algorithm: the Davis-Yin three operator splitting.Fabian PedregosaThu, 06 Sep 2018 00:00:00 +0200tag:fa.bianp.net,2018-09-06:/blog/2018/tos/optimizationproximal splittingthree operator splittingconvergence analysisNotes on the Frank-Wolfe Algorithm, Part Ihttp://fa.bianp.net/blog/2018/notes-on-the-frank-wolfe-algorithm-part-i/ <p>This blog post is the first in a series discussing different theoretical and practical aspects of the Frank-Wolfe algorithm.</p> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js?config=TeX-AMS-MML_HTMLorMML"> </script> <!-- for highlighting --> <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"> <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js"></script> <script>hljs.initHighlightingOnLoad();</script> <div style="display: none"> $$ \def\xx{\boldsymbol x} \def\yy{\boldsymbol y} \def\ss{\boldsymbol s} \def\dd …</div>Fabian PedregosaWed, 21 Mar 2018 00:00:00 +0100tag:fa.bianp.net,2018-03-21:/blog/2018/notes-on-the-frank-wolfe-algorithm-part-i/optimizationFrank-Wolfeconditional gradientconvergence analysisOptimization inequalities cheatsheethttp://fa.bianp.net/blog/2017/optimization-inequalities-cheatsheet/ <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, }, }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js?config=TeX-AMS_CHTML"> </script> <p>Most proofs in optimization consist in using inequalities for a particular function class in some creative way. This is a cheatsheet with inequalities that I use most often. It considers …</p>Fabian PedregosaWed, 11 Jan 2017 00:00:00 +0100tag:fa.bianp.net,2017-01-11:/blog/2017/optimization-inequalities-cheatsheet/optimizationoptimizationcheatsheetA fully asynchronous variant of the SAGA algorithmhttp://fa.bianp.net/blog/2016/a-fully-asynchronous-variant-of-the-saga-algorithm/<p>My friend <a href="http://www.di.ens.fr/~rleblond/">Rémi Leblond</a> has recently uploaded to ArXiv <a href="https://arxiv.org/abs/1606.04809">our preprint on an asynchronous version of the SAGA optimization algorithm</a>.</p> <p>The main contribution is to develop a parallel (fully asynchronous, no locks) variant of the <a href="http://papers.nips.cc/paper/5258-saga-a-fast-incremental-gradient-method-with-support-for-non-strongly-convex-composite-objectives.pdf">SAGA algorighm</a>. This is a stochastic variance-reduced method for general optimization, specially adapted for problems …</p>Fabian PedregosaWed, 12 Oct 2016 00:00:00 +0200tag:fa.bianp.net,2016-10-12:/blog/2016/a-fully-asynchronous-variant-of-the-saga-algorithm/optimizationoptimizationasynchronousSAGAHyperparameter optimization with approximate gradienthttp://fa.bianp.net/blog/2016/hyperparameter-optimization-with-approximate-gradient/ <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, Macros: { RR: "{\\mathbb{R}}", argmin: "{\\mathop{\\mathrm{arg\\,min}}}", bold: ["{\\bf #1}",1] } }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script> <script type="text/javascript" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML"> </script> <p><b>TL;DR:</b> I describe a <a href="http://arxiv.org/abs/1602.02355">method for hyperparameter optimization</a> by gradient descent.</p> <p>Most machine …</p>Fabian PedregosaWed, 25 May 2016 00:00:00 +0200tag:fa.bianp.net,2016-05-25:/blog/2016/hyperparameter-optimization-with-approximate-gradient/optimizationmachine learninghyperparametersHOAGLightning v0.1http://fa.bianp.net/blog/2016/lightning-v01/<p>Announce: first public release of <a href="http://contrib.scikit-learn.org/lightning/">lightning</a>!, a library for large-scale linear classification, regression and ranking in Python. The library was started a couple of years ago by <a href="http://mblondel.org">Mathieu Blondel</a> who also contributed the vast majority of source code. I joined recently its development and decided it was about time for …</p>Fabian PedregosaFri, 25 Mar 2016 00:00:00 +0100tag:fa.bianp.net,2016-03-25:/blog/2016/lightning-v01/softwarePythonscikit-learnmachine learninglightningscikit-learn-contrib, an umbrella for scikit-learn related projects.http://fa.bianp.net/blog/2016/scikit-learn-contrib-an-umbrella-for-scikit-learn-related-projects/<p>Together with other scikit-learn developers we've created an umbrella organization for scikit-learn-related projects named <a href="https://github.com/scikit-learn-contrib">scikit-learn-contrib</a>. The idea is for this organization to host projects that are deemed too specific or too experimental to be included in the scikit-learn codebase but still offer an API which is compatible with scikit-learn and …</p>Fabian PedregosaSun, 06 Mar 2016 00:00:00 +0100tag:fa.bianp.net,2016-03-06:/blog/2016/scikit-learn-contrib-an-umbrella-for-scikit-learn-related-projects/softwarePythonscikit-learnmachine learninglightningSAGA algorithm in the lightning libraryhttp://fa.bianp.net/blog/2016/saga-algorithm-in-the-lightning-library/<p>Recently I've implemented, together with <a href="http://arachez.com/">Arnaud Rachez</a>, the SAGA[<sup id="fnref:1"><a class="footnote-ref" href="#fn:1" rel="footnote">1</a></sup>] algorithm in the <a href="http://contrib.scikit-learn.org/lightning/">lightning</a> machine learning library (which by the way, has been recently moved to the new <a href="https://github.com/scikit-learn-contrib">scikit-learn-contrib</a> project). The lightning library uses the same API as scikit-learn but is particularly adapted to online learning. As for the SAGA …</p>Fabian PedregosaMon, 22 Feb 2016 00:00:00 +0100tag:fa.bianp.net,2016-02-22:/blog/2016/saga-algorithm-in-the-lightning-library/miscPythonscikit-learnmachine learninglightningOn the consistency of ordinal regression methodshttp://fa.bianp.net/blog/2015/on-the-consistency-of-ordinal-regression-methods/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p>My latests work (with <a href="http://www.di.ens.fr/~fbach/">Francis Bach</a> and <a href="http://alexandre.gramfort.net/">Alexandre Gramfort</a>) is on the consistency of ordinal regression methods. It has the wildly imaginative …</p>Fabian PedregosaFri, 09 Oct 2015 00:00:00 +0200tag:fa.bianp.net,2015-10-09:/blog/2015/on-the-consistency-of-ordinal-regression-methods/learning theoryconsistencymachine learningHoldout cross-validation generatorhttp://fa.bianp.net/blog/2015/holdout-cross-validation-generator/<p><a href="http://scikit-learn.org/stable/modules/cross_validation.html#cross-validation-iterators">Cross-validation iterators</a> in scikit-learn are simply generator objects, that is, Python objects that implement the <code>__iter__</code> method and that for each call to this method return (or more precisely, <code>yield</code>) the indices or a boolean mask for the train and test set. Hence, implementing new cross-validation iterators that behave as …</p>Fabian PedregosaThu, 20 Aug 2015 00:00:00 +0200tag:fa.bianp.net,2015-08-20:/blog/2015/holdout-cross-validation-generator/miscPythonscikit-learnmachine learningmodel selectionIPython/Jupyter notebook galleryhttp://fa.bianp.net/blog/2015/ipythonjupyter-notebook-gallery/<p style="font-weight: bold; color:red">Due to lack of time and interest, I'm no longer maintaining this project. Feel free to grab the sources from <a href="https://github.com/fabianp/nbgallery">https://github.com/fabianp/nbgallery</a> and fork the project. </p> <p>TL;DR I created a gallery for IPython/Jupyter notebooks. <a href="http://nb.bianp.net">Check it out :-)</a></p> <div style="text-align: center"> <img alt="Notebook gallery" width="600px" src="http://fa.bianp.net/uploads/2015/screenshot_nbgallery.png" /> </div> <p>A couple of months ago I put online …</p>Fabian PedregosaTue, 21 Apr 2015 00:00:00 +0200tag:fa.bianp.net,2015-04-21:/blog/2015/ipythonjupyter-notebook-gallery/miscPythonJupyterPyData Paris - April 2015http://fa.bianp.net/blog/2015/pydata-paris-april-2015/<p>Last Friday was <a href="http://pydataparis.joinux.org/schedule.html">PyData Paris</a>, in words of the organizers, ''a gathering of users and developers of data analysis tools in Python''. </p> <p><img width="600px" src="http://pydataparis.joinux.org/static/images/PyDataLogoBig-Paris2015.png" /></p> <p>The organizers did a great job in putting together and the event started already with a full room for <a href="http://gael-varoquaux.info/">Gael's</a> keynote</p> <div style="text-align: center"> <img width="600px" alt="Gael's keynote" src="https://pbs.twimg.com/media/CBplCb_WIAEzytd.jpg" /></div> <p>My take-away message from the talks is …</p>Fabian PedregosaTue, 07 Apr 2015 00:00:00 +0200tag:fa.bianp.net,2015-04-07:/blog/2015/pydata-paris-april-2015/miscPythonParisNumPyNumbaData-driven hemodynamic response function estimationhttp://fa.bianp.net/blog/2014/data-driven-hemodynamic-response-function-estimation/<p>My <a href="http://www.sciencedirect.com/science/article/pii/S1053811914008027">latest research paper</a>[<sup id="fnref:1"><a class="footnote-ref" href="#fn:1" rel="footnote">1</a></sup>] deals with the estimation of the hemodynamic response function (HRF) from fMRI data. </p> <div style="text-align: center"> <img width="600px" src="/images/2014/graphical_abstract.jpg" /> </div> <p>This is an important topic since the knowledge of a hemodynamic response function is what makes it possible to extract the brain activation maps that are used in most of the impressive …</p>Fabian PedregosaFri, 05 Dec 2014 00:00:00 +0100tag:fa.bianp.net,2014-12-05:/blog/2014/data-driven-hemodynamic-response-function-estimation/miscfMRIGLMpythonPlot memory usage as a function of timehttp://fa.bianp.net/blog/2014/plot-memory-usage-as-a-function-of-time/<p>:og_image: http://fa.bianp.net/blog/images/2014/mprof_example.png</p> <p>One of the lesser known features of the <a href="https://pypi.python.org/pypi/memory_profiler">memory_profiler package</a> is its ability to plot memory consumption as a function of time. This was implemented by my friend Philippe Gervais, previously a colleague at INRIA and now at Google.</p> <p>With …</p>Fabian PedregosaFri, 07 Nov 2014 00:00:00 +0100tag:fa.bianp.net,2014-11-07:/blog/2014/plot-memory-usage-as-a-function-of-time/miscmemory_profilermprofprofileSurrogate Loss Functions in Machine Learninghttp://fa.bianp.net/blog/2014/surrogate-loss-functions-in-machine-learning/<!-- <div style="float: left; margin: 20px; width; 200px" > <img src="http://upload.wikimedia.org/wikipedia/commons/4/46/R._A._Fischer.jpg" /> <p>Sir R. A. Fisher. Source: Wikipedia </p> </div> --> <p><script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\(","\)"] ], displayMath: [ ['$$','$$'], ["\[","\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script></p> <p><span class="bold">TL; DR</span> These are some notes on calibration of surrogate loss functions in the context of machine learning. But mostly it is …</p>Fabian PedregosaFri, 20 Jun 2014 00:00:00 +0200tag:fa.bianp.net,2014-06-20:/blog/2014/surrogate-loss-functions-in-machine-learning/miscmachine learningconsistencycalibrationDifferent ways to get memory consumption or lessons learned from ``memory_profiler``http://fa.bianp.net/blog/2013/different-ways-to-get-memory-consumption-or-lessons-learned-from-memory_profiler/<p>As part of the development of <a href="https://pypi.python.org/pypi/memory_profiler">memory_profiler</a> I've tried several ways to get memory usage of a program from within Python. In this post I'll describe the different alternatives I've tested.</p> <h3>The psutil library</h3> <p><a href="https://code.google.com/p/psutil/">psutil</a> is a python library that provides an interface for retrieving information on running processes. It …</p>Fabian PedregosaThu, 25 Jul 2013 00:00:00 +0200tag:fa.bianp.net,2013-07-25:/blog/2013/different-ways-to-get-memory-consumption-or-lessons-learned-from-memory_profiler/miscPythonmemorymemory_profilerNumerical optimizers for Logistic Regressionhttp://fa.bianp.net/blog/2013/numerical-optimizers-for-logistic-regression/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p>In this post I compar several implementations of Logistic Regression. The task was to implement a Logistic Regression model using standard optimization …</p>Fabian PedregosaMon, 20 May 2013 00:00:00 +0200tag:fa.bianp.net,2013-05-20:/blog/2013/numerical-optimizers-for-logistic-regression/miscmachine learninglogistic regressionPythonSciPyLogistic Ordinal Regressionhttp://fa.bianp.net/blog/2013/logistic-ordinal-regression/<p><strong>TL;DR: I've implemented a logistic ordinal regression or proportional odds model. <a href="http://github.com/fabianp/minirank/blob/master/minirank/logistic.py">Here is the Python code</a></strong></p> <p><script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'] ], displayMath: [ ['$$','$$'], ["\[","\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script></p> <p>The <em>logistic ordinal regression</em> model …</p>Fabian PedregosaThu, 02 May 2013 00:00:00 +0200tag:fa.bianp.net,2013-05-02:/blog/2013/logistic-ordinal-regression/miscmachine learningordinal regressionPythonrankingIsotonic Regressionhttp://fa.bianp.net/blog/2013/isotonic-regression/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p>My latest contribution for <a href="http://scikit-learn.org">scikit-learn</a> is an implementation of the isotonic regression model that I coded with <a href="https://twitter.com/nvaroqua">Nelle Varoquaux</a> and <a href="http://alexandre.gramfort.net/">Alexandre Gramfort …</a></p>Fabian PedregosaTue, 16 Apr 2013 00:00:00 +0200tag:fa.bianp.net,2013-04-16:/blog/2013/isotonic-regression/miscisotonic regressionmachine learningPythonscikit-learnHouseholder matriceshttp://fa.bianp.net/blog/2013/householder-matrices/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p>Householder matrices are square matrices of the form</p> <p>$$ P = I - \beta v v^T$$</p> <p>where $\beta$ is a scalar and $v$ is …</p>Fabian PedregosaSat, 30 Mar 2013 00:00:00 +0100tag:fa.bianp.net,2013-03-30:/blog/2013/householder-matrices/misclinear algebrahouseholderQRLoss Functions for Ordinal regressionhttp://fa.bianp.net/blog/2013/loss-functions-for-ordinal-regression/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p><strong> Note: this post contains a fair amount of LaTeX, if you don't visualize the math correctly come to its <a href="http://fa.bianp.net/blog/2013/loss-functions-for-ordinal-regression/">original location</a> </strong></p> <p>In …</p>Fabian PedregosaWed, 27 Feb 2013 00:00:00 +0100tag:fa.bianp.net,2013-02-27:/blog/2013/loss-functions-for-ordinal-regression/miscmachine learningordinal regressionloss functionMemory plots with memory_profilerhttp://fa.bianp.net/blog/2013/memory-plots-with-memory_profiler/<p>Besides performing a line-by-line analysis of memory consumption, <a href="http://pypi.python.org/pypi/memory_profiler"><code>memory_profiler</code></a> exposes some functions that allow to retrieve the memory consumption of a function in real-time, allowing e.g. to visualize the memory consumption of a given function over time.</p> <p>The function to be used is <code>memory_usage</code>. The first argument specifies what …</p>Fabian PedregosaFri, 04 Jan 2013 00:00:00 +0100tag:fa.bianp.net,2013-01-04:/blog/2013/memory-plots-with-memory_profiler/miscPythonmemorymemory_profilerSingular Value Decomposition in SciPyhttp://fa.bianp.net/blog/2012/singular-value-decomposition-in-scipy/<p>SciPy contains two methods to compute the singular value decomposition (SVD) of a matrix: <code>scipy.linalg.svd</code> and <code>scipy.sparse.linalg.svds</code>. In this post I'll compare both methods for the task of computing the full SVD of a large dense matrix.</p> <p>The first method, <code>scipy.linalg.svd</code>, is perhaps …</p>Fabian PedregosaSat, 08 Dec 2012 00:00:00 +0100tag:fa.bianp.net,2012-12-08:/blog/2012/singular-value-decomposition-in-scipy/miscpythonscipysvdLearning to rank with scikit-learn: the pairwise transformhttp://fa.bianp.net/blog/2012/learning-to-rank-with-scikit-learn-the-pairwise-transform/<script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\\(","\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true }, TeX: { equationNumbers: { autoNumber: "AMS" }, extensions: ["AMSmath.js", "AMSsymbols.js"] }, "HTML-CSS": { fonts: ["TeX"] } }); </script> <script type="text/javascript" async src="/js/mathjax@2.7.5/MathJax.js"> </script> <p>This tutorial introduces the concept of pairwise preference used in most <a href="http://en.wikipedia.org/wiki/Learning_to_rank">ranking problems</a>. I'll use scikit-learn and for learning and matplotlib for …</p>Fabian PedregosaTue, 23 Oct 2012 00:00:00 +0200tag:fa.bianp.net,2012-10-23:/blog/2012/learning-to-rank-with-scikit-learn-the-pairwise-transform/miscpythonscikit-learnrankingline-by-line memory usage of a Python programhttp://fa.bianp.net/blog/2012/line-by-line-report-of-memory-usage/<p>My newest project is a Python library for monitoring memory consumption of arbitrary process, and one of its most useful features is the line-by-line analysis of memory usage for Python code. I wrote a basic prototype six months ago after being surprised by the lack of related tools. I wanted …</p>Fabian PedregosaTue, 24 Apr 2012 07:04:00 +0200tag:fa.bianp.net,2012-04-24:/blog/2012/line-by-line-report-of-memory-usage/miscpythonmemory_profilerLow rank approximationhttp://fa.bianp.net/blog/2011/low-rank-approximation/<p>A little experiment to see what low rank approximation looks like. These are the best rank-k approximations (in the Frobenius norm) to the a natural image for increasing values of k and an original image of rank 512.</p> <img alt="" src="/blog/static/uploads/2011/11/animation1.gif" /> <p>Python code can be found <a class="reference external" href="https://gist.github.com/1342033">here</a>. GIF animation made using ImageMagic's convert …</p>Fabian PedregosaSun, 06 Nov 2011 12:05:00 +0100tag:fa.bianp.net,2011-11-06:/blog/2011/low-rank-approximation/miscmachine learningpythonqr_multiply function in scipy.linalghttp://fa.bianp.net/blog/2011/qr_multiply-function-in-scipylinalg/<p>In scipy's development version there's a new function closely related to the <a class="reference external" href="http://en.wikipedia.org/wiki/QR_decomposition">QR-decomposition</a> of a matrix and to the least-squares solution of a linear system. What this function does is to compute the QR-decomposition of a matrix and then multiply the resulting orthogonal factor by another arbitrary matrix. In pseudocode …</p>Fabian PedregosaFri, 14 Oct 2011 16:44:00 +0200tag:fa.bianp.net,2011-10-14:/blog/2011/qr_multiply-function-in-scipylinalg/miscpythonscipyscikit-learn 0.9http://fa.bianp.net/blog/2011/scikit-learn-09/<p>Last week we released a new version of scikit-learn. The <a class="reference external" href="http://scikit-learn.sourceforge.net/stable/whats_new.html">Changelog is particularly impressive</a>, yet personally this release is important for other reasons. This will probably be my last release as a paid engineer. I'm starting a PhD next month, and although I plan to continue contributing to the project …</p>Fabian PedregosaSun, 02 Oct 2011 11:19:00 +0200tag:fa.bianp.net,2011-10-02:/blog/2011/scikit-learn-09/General, scikit-learnReworked example gallery for scikit-learnhttp://fa.bianp.net/blog/2011/reworked-example-gallery-for-scikit-learn/<p>I've been working lately in improving the scikit-learn example gallery to show also a small thumbnail of the plotted result. Here is what the gallery looks like now:</p> <img alt="" src="http://fa.bianp.net/blog/static/uploads/2011/09/screenshot.png" /> <p>And the real thing should be already displayed in the <a class="reference external" href="http://scikit-learn.sourceforge.net/dev/auto_examples/index.html">development-documentation</a>. The next thing is to add a static image to those …</p>Fabian PedregosaSun, 04 Sep 2011 20:09:00 +0200tag:fa.bianp.net,2011-09-04:/blog/2011/reworked-example-gallery-for-scikit-learn/scikit-learnscikit-learn’s EuroScipy 2011 coding sprint -- day twohttp://fa.bianp.net/blog/2011/scikit-learns-euroscipy-2011-coding-sprint-day-two/<p><img alt="image0" src="http://fseoane.net/blog/static/uploads/2011/08/all-300x225.jpg" /></p> <p>Today's coding sprint was a bit more crowded, with some notable scipy hackers such as Ralph Gommers, <a class="reference external" href="http://mentat.za.net/">Stefan van der Walt</a>, <a class="reference external" href="http://cournape.wordpress.com/">David Cournapeau</a> or <a class="reference external" href="http://blog.fperez.org/">Fernando Perez</a> from Ipython joining in. On what got done: - We merged <a class="reference external" href="http://www.astro.washington.edu/users/vanderplas/">Jake</a>'s new BallTree code. This is a pure Cython implementation of a nearest-neighbor …</p>Fabian PedregosaThu, 25 Aug 2011 00:33:00 +0200tag:fa.bianp.net,2011-08-25:/blog/2011/scikit-learns-euroscipy-2011-coding-sprint-day-two/General, Python, scikit-learnscikit-learn EuroScipy 2011 coding sprint -- day onehttp://fa.bianp.net/blog/2011/scikit-learn-euroscipy-2011-coding-sprint-day-one/<p>As a warm-up for the upcoming <a class="reference external" href="http://www.euroscipy.org/conference/euroscipy2011">EuroScipy-conference</a>, some of the <a class="reference external" href="http://scikit-learn.sf.net">scikit-learn</a> developers decided to gather and work together for a couple of days. Today was the first day and there was only a handfull of us, as the real kickoff is expected tomorrow. Some interesting coding happened, although most of …</p>Fabian PedregosaTue, 23 Aug 2011 21:38:00 +0200tag:fa.bianp.net,2011-08-23:/blog/2011/scikit-learn-euroscipy-2011-coding-sprint-day-one/miscscikit-learnpythonRidge regression pathhttp://fa.bianp.net/blog/2011/ridge-regression-path/<p>Ridge coefficients for multiple values of the regularization parameter can be elegantly computed by updating the <em>thin</em> SVD decomposition of the design matrix:</p> <div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">numpy</span> <span class="k">as</span> <span class="nn">np</span> <span class="kn">from</span> <span class="nn">scipy</span> <span class="kn">import</span> <span class="n">linalg</span> <span class="k">def</span> <span class="nf">ridge</span><span class="p">(</span><span class="n">A</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">alphas</span><span class="p">):</span> <span class="w"> </span><span class="sd">&quot;&quot;&quot;</span> <span class="sd"> Return coefficients for regularized least squares</span> <span class="sd"> min ||A x - b||^2 + alpha ||x||^2 …</span></pre></div>Fabian PedregosaTue, 12 Jul 2011 09:21:00 +0200tag:fa.bianp.net,2011-07-12:/blog/2011/ridge-regression-path/miscscikit-learnscipylinear algebraLLE comes in different flavourshttp://fa.bianp.net/blog/2011/lle-comes-in-different-flavours/<p>I haven't worked in the manifold module since <a class="reference external" href="http://fa.bianp.net/blog/2011/manifold-learning-in-scikit-learn/">last time</a>, yet thanks to <a class="reference external" href="http://www.astro.washington.edu/users/vanderplas/">Jake VanderPlas</a> there are some cool features I can talk about. First of, the ARPACK backend is finally working and gives factor one speedup over the <a class="reference external" href="http://fa.bianp.net/blog/2011/locally-linear-embedding-and-sparse-eigensolvers/">lobcpg + PyAMG approach</a>. The key is to use ARPACK's shift-invert mode …</p>Fabian PedregosaThu, 30 Jun 2011 16:22:00 +0200tag:fa.bianp.net,2011-06-30:/blog/2011/lle-comes-in-different-flavours/General, manifold learning, scikit-learnManifold learning in scikit-learnhttp://fa.bianp.net/blog/2011/manifold-learning-in-scikit-learn/<p>The manifold module in <a class="reference external" href="http://scikit-learn.sf.net">scikit-learn</a> is slowly progressing: the <a class="reference external" href="http://fa.bianp.net/blog/2011/locally-linear-embedding-and-sparse-eigensolvers/">locally linear embedding</a> implementation was finally merged along with <a class="reference external" href="http://scikit-learn.sourceforge.net/dev/modules/manifold.html">some documentation</a>. At about the same time but in a different timezone, <a class="reference external" href="http://www.astro.washington.edu/users/vanderplas/">Jake VanderPlas</a> began coding <a class="reference external" href="https://github.com/jakevdp/scikit-learn/compare/master...manifold">other manifold learning methods</a> and back in Paris <a class="reference external" href="http://twitter.com/ogrisel">Olivier Grisel</a> made <a class="reference external" href="http://fa.bianp.net/blog/2011/handwritten-digits-and-locally-linear-embedding/">my digits example</a> a <a class="reference external" href="http://scikit-learn.sourceforge.net/dev/auto_examples/manifold/plot_lle_digits.html">lot …</a></p>Fabian PedregosaTue, 07 Jun 2011 09:19:00 +0200tag:fa.bianp.net,2011-06-07:/blog/2011/manifold-learning-in-scikit-learn/scikit-learnHandwritten digits and Locally Linear Embeddinghttp://fa.bianp.net/blog/2011/handwritten-digits-and-locally-linear-embedding/<p>I decided to test my <a class="reference external" href="http://fa.bianp.net/blog/2011/locally-linear-embedding-and-sparse-eigensolvers/">new Locally Linear Embedding (LLE)</a> implementation against a real dataset. At first I didn't think this would turn out very well, since LLE seems to be somewhat fragile, yielding largely different results for small differences in parameters such as number of neighbors or tolerance, but …</p>Fabian PedregosaWed, 04 May 2011 10:46:00 +0200tag:fa.bianp.net,2011-05-04:/blog/2011/handwritten-digits-and-locally-linear-embedding/General, Python, scikit-learnLow-level routines for Support Vector Machineshttp://fa.bianp.net/blog/2011/low-level-routines-for-support-vector-machines/<p>I've been working lately in improving the low-level API of the libsvm bindings in scikit-learn. The goal is to provide an API that encourages an efficient use of these libraries for expert users. These are methods that have lower overhead than the <a class="reference external" href="http://scikit-learn.sourceforge.net/modules/svm.html">object-oriented interface</a> as they are closer to the …</p>Fabian PedregosaWed, 27 Apr 2011 15:27:00 +0200tag:fa.bianp.net,2011-04-27:/blog/2011/low-level-routines-for-support-vector-machines/General, Python, scikit-learnnew get_blas_funcs in scipy.linalghttp://fa.bianp.net/blog/2011/new-get_blas_funcs-in-scipylinalg/<p>Today got merged some changes I made to function scipy.linalg.get_blas_funcs(). The main enhacement is that get_blas_funcs() now also accepts a single string as input parameter and a dtype, so that fetching the BLAS function for a specific type becomes more natural. For example, fetching the gemm routine for …</p>Fabian PedregosaSat, 23 Apr 2011 18:24:00 +0200tag:fa.bianp.net,2011-04-23:/blog/2011/new-get_blas_funcs-in-scipylinalg/General, Python, scipyLocally linear embedding and sparse eigensolvershttp://fa.bianp.net/blog/2011/locally-linear-embedding-and-sparse-eigensolvers/<p>I've been working for some time on implementing a <a class="reference external" href="http://www.cs.nyu.edu/~roweis/lle/algorithm.html">locally linear embedding</a> algorithm for the upcoming manifold module in scikit-learn. While several implementations of this algorithm exist in Python, as far as I know none of them is able to use a sparse eigensolver in the last step of the …</p>Fabian PedregosaThu, 21 Apr 2011 14:28:00 +0200tag:fa.bianp.net,2011-04-21:/blog/2011/locally-linear-embedding-and-sparse-eigensolvers/General, Python, scikit-learnscikits.learn is now part of pythonxyhttp://fa.bianp.net/blog/2011/scikitslearn-is-now-part-of-pythonxy/<p>The guys behind <a class="reference external" href="http://www.pythonxy.com/">pythonxy</a> have been kind enough to add the latest scikit-learn as an <a class="reference external" href="http://code.google.com/p/pythonxy/wiki/AdditionalPlugins">additional plugin</a> for their distribution. Having scikit-learn being in both <a class="reference external" href="http://www.pythonxy.com/">pythonxy</a> and <a class="reference external" href="http://www.enthought.com/products/epd.php">EPD</a> will hopefully make it easier to use for Windows users. <img alt="pythonxy-logo" src="http://fa.bianp.net/blog/static/uploads/2011/04/pythonxy-logo.png" /> For now I will continue to make windows precompiled binaries, but pythonxy …</p>Fabian PedregosaWed, 20 Apr 2011 13:48:00 +0200tag:fa.bianp.net,2011-04-20:/blog/2011/scikitslearn-is-now-part-of-pythonxy/General, Python, scikit-learnLeast squares with equality constrainhttp://fa.bianp.net/blog/2011/least-squares-with-equality-constrain/<p>The following algorithm computes the Least squares solution || Ax - b|| subject to the equality constrain Bx = d. It's a classic algorithm that can be implemented only using a QR decomposition and a least squares solver. This implementation uses numpy and scipy. It makes use of the new linalg.solve_triangular function …</p>Fabian PedregosaThu, 14 Apr 2011 10:02:00 +0200tag:fa.bianp.net,2011-04-14:/blog/2011/least-squares-with-equality-constrain/Python, Tecnologí­aA profiler for Python extensionshttp://fa.bianp.net/blog/2011/a-profiler-for-python-extensions/<p>Profiling Python extensions has not been a pleasant experience for me, so I made my own package to do the job. Existing alternatives were either hard to use, forcing you to recompile with custom flags like gprofile or desperately slow like valgrind/callgrind. The package I'll talk about is called …</p>Fabian PedregosaWed, 06 Apr 2011 14:02:00 +0200tag:fa.bianp.net,2011-04-06:/blog/2011/a-profiler-for-python-extensions/General, Pythonscikit-learn coding sprint in Parishttp://fa.bianp.net/blog/2011/scikit-learn-coding-sprint-in-paris/<p>Yesterday was the scikit-learn coding sprint in Paris. It was great to meet with old developers (Vincent Michel) and new ones: some of whom I was already familiar with from the mailing list while others came just to say hi and get familiar with the code. It was really great …</p>Fabian PedregosaSat, 02 Apr 2011 12:07:00 +0200tag:fa.bianp.net,2011-04-02:/blog/2011/scikit-learn-coding-sprint-in-paris/General, scikit-learnpy3k in scikit-learnhttp://fa.bianp.net/blog/2011/py3k-in-scikit-learn/<p>One thing I'd really like to see done in <a class="reference external" href="http://gael-varoquaux.info/blog/?p=149">this Friday's scikit-learn sprint</a> is to have full support for Python 3. There's <a class="reference external" href="http://github.com/fabianp/scikit-learn/compare/master...py3k">a branch were the hard word has been done</a> (porting C extensions, automatic 2to3 conversion, etc.), although joblib still has some bugs and no one has attempted to …</p>Fabian PedregosaMon, 28 Mar 2011 15:23:00 +0200tag:fa.bianp.net,2011-03-28:/blog/2011/py3k-in-scikit-learn/GeneralComputing the vector normhttp://fa.bianp.net/blog/2011/computing-the-vector-norm/<p><strong>Update: a fast and stable norm was added to scipy.linalg in August 2011 and will be available in scipy 0.10</strong> Last week I discussed with <a class="reference external" href="http://gael-varoquaux.info/blog/">Gael</a> how we should compute the euclidean norm of a vector a using SciPy. Two approaches suggest themselves, either calling scipy.linalg.norm …</p>Fabian PedregosaTue, 15 Feb 2011 10:31:00 +0100tag:fa.bianp.net,2011-02-15:/blog/2011/computing-the-vector-norm/misclinear algebranormscipySmells like hacker spirithttp://fa.bianp.net/blog/2011/smells-like-hacker-spirit/<p>I was last weekend in <a class="reference external" href="http://fosdem.org/2011/">FOSDEM</a> presenting <a class="reference external" href="http://scikit-learn.sf.net">scikits.learn</a> (<a class="reference external" href="http://fa.bianp.net/talks/fosdem-skl/">here are the slides</a> I used at the Data Analytics Devroom). Kudos to <a class="reference external" href="http://twitter.com/#!/ogrisel">Olivier Grisel</a> and all the people who organized such a fun and authentic meeting!</p> <p><img alt="image0" src="http://farm6.static.flickr.com/5136/5417861859_8480c65eed_m.jpg" /></p> <p><img alt="image1" src="http://farm6.static.flickr.com/5294/5425114531_6eec316967_m.jpg" /></p> Fabian PedregosaFri, 11 Feb 2011 09:50:00 +0100tag:fa.bianp.net,2011-02-11:/blog/2011/smells-like-hacker-spirit/miscpythonsklearnNew examples in scikits.learn 0.6http://fa.bianp.net/blog/2010/new-examples-in-scikitslearn-06/<p>Latest release of <a class="reference external" href="http://scikit-learn.sf.net">scikits.learn</a> comes with an <a class="reference external" href="http://scikit-learn.sourceforge.net/0.6/auto_examples/index.html">awesome collection of examples</a>. These are some of my favorites:</p> <div class="section" id="faces-recognition"> <h2>Faces recognition</h2> <p><a class="reference external" href="http://scikit-learn.sourceforge.net/0.6/auto_examples/applications/plot_face_recognition.html">This example</a> by <a class="reference external" href="http://twitter.com/ogrisel/">Olivier Grisel</a>, downloads a 58MB faces dataset from <a class="reference external" href="http://vis-www.cs.umass.edu/lfw/">Labeled Faces in the Wild</a>, and is able to perform PCA for feature extraction and SVC for classification, yielding …</p></div>Fabian PedregosaFri, 31 Dec 2010 13:55:00 +0100tag:fa.bianp.net,2010-12-31:/blog/2010/new-examples-in-scikitslearn-06/General, scikit-learn, Tecnologí­aWeighted samples for SVMshttp://fa.bianp.net/blog/2010/weighted-samples-for-svms/<p>Based on the work of <a class="reference external" href="http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/#weights_for_data_instances">libsvm-dense</a> by Ming-Wei Chang, Hsuan-Tien Lin, Ming-Hen Tsai, Chia-Hua Ho and Hsiang-Fu Yu I patched the libsvm distribution shipped with scikits.learn to allow setting weights for individual instances. The motivation behind this is to be able force a classifier to focus its attention in …</p>Fabian PedregosaMon, 29 Nov 2010 13:20:00 +0100tag:fa.bianp.net,2010-11-29:/blog/2010/weighted-samples-for-svms/sklearn, pythonComing soon ...http://fa.bianp.net/blog/2010/coming-soon/<img alt="" src="http://farm5.static.flickr.com/4107/5203822436_41b9c350c2.jpg" /> <p>Highlights for this release: * New <a class="reference external" href="http://scikit-learn.sourceforge.net/modules/sgd.html">stochastic gradient descent module</a> by <a class="reference external" href="http://sites.google.com/site/peterprettenhofer/">Peter Prettenhofer</a> * Improved svm module: memory efficiency, automatic class weights. * Wrap for liblinear's Multi-class SVC (option multi_class in <a class="reference external" href="http://scikit-learn.sourceforge.net/modules/generated/scikits.learn.svm.LinearSVC.html">LinearSVC</a>) * New features and performance improvements of text feature extraction. * Improved sparse matrix support, both in main classes (GridSearch) as in sparse …</p>Fabian PedregosaWed, 24 Nov 2010 10:39:00 +0100tag:fa.bianp.net,2010-11-24:/blog/2010/coming-soon/scikit-learn, Tecnologí­amemory efficient bindigs for libsvmhttp://fa.bianp.net/blog/2010/memory-efficient-bindigs-for-libsvm/<p><a class="reference external" href="http://scikit-learn.sf.net">scikits.learn.svm</a> now uses <a class="reference external" href="http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/#libsvm_for_dense_data">LibSVM-dense</a> instead of <a class="reference external" href="http://www.csie.ntu.edu.tw/~cjlin/libsvm/">LibSVM</a> for some support vector machine related algorithms when input is a dense matrix. As a result most of the copies associated with argument passing are avoided, giving 50% less memory footprint and several times less than the python bindings that ship …</p>Fabian PedregosaFri, 19 Nov 2010 15:08:00 +0100tag:fa.bianp.net,2010-11-19:/blog/2010/memory-efficient-bindigs-for-libsvm/General, scikit-learnsolve triangular matrices using scipy.linalghttp://fa.bianp.net/blog/2010/solve-triangular-matrices-using-scipylinalg/<p>For some time now I've been missing a function in scipy that exploits the triangular structure of a matrix to efficiently solve the associated system, so I decided to <a class="reference external" href="http://projects.scipy.org/scipy/changeset/6844">implement it</a> by binding the LAPACK method &quot;trtrs&quot;, which also checks for singularities and is capable handling several right-hand sides. Contrary …</p>Fabian PedregosaSat, 30 Oct 2010 01:13:00 +0200tag:fa.bianp.net,2010-10-30:/blog/2010/solve-triangular-matrices-using-scipylinalg/scipy, Tecnologí­aLARS algorithmhttp://fa.bianp.net/blog/2010/lars-algorithm/<p>I've been working lately with <a class="reference external" href="http://www-sop.inria.fr/members/Alexandre.Gramfort/">Alexandre Gramfort</a> coding the <a class="reference external" href="http://scikit-learn.sf.net/modules/glm.html#lars-algorithm-and-its-variants">LARS algorithm</a> in <a class="reference external" href="hhtp://scikit-learn.sf.net">scikits.learn</a>. This algorithm computes the solution to several general linear models used in machine learning: LAR, Lasso, Elasticnet and Forward Stagewise. Unlike the implementation by coordinate descent, the LARS algorithm gives the full coefficient path along the …</p>Fabian PedregosaThu, 30 Sep 2010 16:01:00 +0200tag:fa.bianp.net,2010-09-30:/blog/2010/lars-algorithm/miscscikit-learnsparseSecond scikits.learn coding sprinthttp://fa.bianp.net/blog/2010/second-scikitslearn-coding-sprint/<p>Las week took place in Paris the second <a class="reference external" href="http://scikit-learn.sf.net">scikits.learn</a> sprint. It was two days of insane activity (115 commits, 6 branches, 33 coffees) in which we did a lot of work, both implementing new algorithms and fixing or improving old ones. This includes: * sparse version of Lasso by coordinate …</p>Fabian PedregosaSun, 12 Sep 2010 22:31:00 +0200tag:fa.bianp.net,2010-09-12:/blog/2010/second-scikitslearn-coding-sprint/scikit-learnSupport for sparse matrices in scikits.learnhttp://fa.bianp.net/blog/2010/support-for-sparse-matrices-in-scikitslearn/<p>I recently added support for sparse matrices (as defined in scipy.sparse) in some classifiers of <a class="reference external" href="http://scikit-learn.sf.net">scikits.learn</a>. In those classes, the fit method will perform the algorithm without converting to a dense representation and will also store parameters in an efficient format. Right now, the only classese that implements …</p>Fabian PedregosaMon, 23 Aug 2010 17:47:00 +0200tag:fa.bianp.net,2010-08-23:/blog/2010/support-for-sparse-matrices-in-scikitslearn/GeneralFlags to debug python C extensions.http://fa.bianp.net/blog/2010/flags-to-debug-python-c-extensions/<p>I often find myself debugging python C extensions from gdb, but usually some variables are hidden because aggressive optimizations that distutils sets by default. What I did not know, is that you can prevent those optimizations by passing flags -O0 -fno-inline to gcc in keyword extra_compile_args (note: this will only …</p>Fabian PedregosaWed, 18 Aug 2010 13:40:00 +0200tag:fa.bianp.net,2010-08-18:/blog/2010/flags-to-debug-python-c-extensions/GeneralJuly in Parishttp://fa.bianp.net/blog/2010/july-in-paris/<p>One of the best things of spending summer in Paris: its parcs (here, with friends &#64; Parc Montsouris).</p> <p><img alt="image0" src="http://farm5.static.flickr.com/4103/4842146900_953f961d64.jpg" /></p> Fabian PedregosaFri, 30 Jul 2010 00:11:00 +0200tag:fa.bianp.net,2010-07-30:/blog/2010/july-in-paris/GeneralSupport Vector machines with custom kernels using scikits.learnhttp://fa.bianp.net/blog/2010/support-vector-machines-with-custom-kernels-using-scikitslearn/<p>It is now possible (using the development version as of may 2010) to use Support Vector Machines with custom kernels in scikits.learn. How to use it couldn't be more simple: you just pass a callable (the kernel) to the class constructor). For example, a linear kernel would be implemented …</p>Fabian PedregosaThu, 27 May 2010 10:42:00 +0200tag:fa.bianp.net,2010-05-27:/blog/2010/support-vector-machines-with-custom-kernels-using-scikitslearn/General, scikit-learn, Tecnologí­aHowto link against system-wide BLAS library using numpy.distutilshttp://fa.bianp.net/blog/2010/howto-link-against-system-wide-blas-library-using-numpydistutils/<p>If your numpy installation uses system-wide BLAS libraries (this will most likely be the case unless you installed it through prebuilt windows binaries), you can retrieve this information at compile time to link python modules to BLAS. The function get_info in numpy.distutils.system_info will return a dictionary that contains …</p>Fabian PedregosaThu, 22 Apr 2010 14:28:00 +0200tag:fa.bianp.net,2010-04-22:/blog/2010/howto-link-against-system-wide-blas-library-using-numpydistutils/Generalscikits.learn 0.2 releasehttp://fa.bianp.net/blog/2010/scikitslearn-02-release/<p>Today I released a new version of the <a class="reference external" href="http://scikit-learn.sourceforge.net">scikits.learn</a> library for machine learning. This new release includes the new libsvm bindings, Jake VanderPlas' BallTree algorithm for *fast* nearest neighbor queries in high dimension, etc. <a class="reference external" href="http://sourceforge.net/mailarchive/message.php?msg_name=4BA72BE3.1010208%40inria.fr">Here</a> is the official announcement. As usual, it can be downloaded from <a class="reference external" href="http://sourceforge.net/projects/scikit-learn/files">sourceforge</a> or from …</p>Fabian PedregosaMon, 22 Mar 2010 11:37:00 +0100tag:fa.bianp.net,2010-03-22:/blog/2010/scikitslearn-02-release/GeneralPlot the maximum margin hyperplane with scikits.learnhttp://fa.bianp.net/blog/2010/plot-the-maximum-margin-hyperplane-with-scikitslearn/<p>Suppose some given data points each belong to one of two classes, and the goal is to decide which class a new data point will be in. In the case of support vector machines, a data point is viewed as a p-dimensional vector (2-dimensional in this example), and we want …</p>Fabian PedregosaWed, 17 Mar 2010 12:24:00 +0100tag:fa.bianp.net,2010-03-17:/blog/2010/plot-the-maximum-margin-hyperplane-with-scikitslearn/General, scikit-learn, Tecnologí­aFast bindings for LibSVM in scikits.learnhttp://fa.bianp.net/blog/2010/fast-bindings-for-libsvm-in-scikitslearn/<p><a class="reference external" href="http://www.csie.ntu.edu.tw/~cjlin/libsvm/">LibSVM</a> is a C++ library that implements several Support Vector Machine algorithms that are commonly used in machine learning. It is a fast library that has no dependencies and most machine learning frameworks bind it in some way or another. LibSVM comes with a Python interface written in swig, but …</p>Fabian PedregosaTue, 09 Mar 2010 15:49:00 +0100tag:fa.bianp.net,2010-03-09:/blog/2010/fast-bindings-for-libsvm-in-scikitslearn/General, scikit-learn, Tecnologí­ascikits.learn coding sprint in Parishttp://fa.bianp.net/blog/2010/scikitslearn-coding-sprint-in-paris/<p>Yesterday we had an extremely productive coding sprint for the <a class="reference external" href="http://scikit-learn.sf.net">scikits.learn</a>. The idea was to put people with common interests in a room and make them work in a single codebase. Alexandre Gramfort and Olivier Grisel worked on <a class="reference external" href="http://scikit-learn.svn.sourceforge.net/viewvc/scikit-learn/trunk/scikits/learn/glm/">GLMNet</a>, Bertrand Thirion and Gaël Varoquaux worked on <a class="reference external" href="http://scikit-learn.svn.sourceforge.net/viewvc/scikit-learn/trunk/scikits/learn/feature_selection/">univariate feature selection …</a></p>Fabian PedregosaThu, 04 Mar 2010 11:25:00 +0100tag:fa.bianp.net,2010-03-04:/blog/2010/scikitslearn-coding-sprint-in-paris/scikit-learn, Tecnologí­aScikit-learn 0.1http://fa.bianp.net/blog/2010/scikit-learn-01/<p>Today I released the first public version of <a class="reference external" href="http://scikit-learn.sourceforge.net">Scikit-Learn</a> (<a class="reference external" href="https://sourceforge.net/mailarchive/message.php?msg_name=4B66D190.5090100%40inria.fr">release notes</a>). It's a python module implementing some machine learning algorithms, and it's shaping quite good.</p> <p>For this release I did not want to do any incompatible changes, so most of them are just bug fixes and updates. For the next …</p>Fabian PedregosaMon, 01 Feb 2010 15:32:00 +0100tag:fa.bianp.net,2010-02-01:/blog/2010/scikit-learn-01/Software, scikit-learnscikit-learn project on sourceforgehttp://fa.bianp.net/blog/2010/scikit-learn-project-on-sourceforge/<p>This week we created a <a class="reference external" href="https://sourceforge.net/projects/scikit-learn/">sourceforge project</a> to host our development of scikit-learn. Although the project already had a directory in scipy's repo, we needed more flexibility in the user management and in the mailing list creation, so we opted for SourceForge. To be honest, after using git and Google …</p>Fabian PedregosaThu, 07 Jan 2010 15:17:00 +0100tag:fa.bianp.net,2010-01-07:/blog/2010/scikit-learn-project-on-sourceforge/General, scikit-learn, Tecnologí­aAfter holidayshttp://fa.bianp.net/blog/2010/after-holidays/<p>New job, new code, new city, new colleagues. Feels something like this:</p> <img alt="" src="http://farm5.static.flickr.com/4027/4240407852_6f461f3776_m.jpg" /> Fabian PedregosaTue, 05 Jan 2010 10:56:00 +0100tag:fa.bianp.net,2010-01-05:/blog/2010/after-holidays/GeneralWinter in Paris is not funnyhttp://fa.bianp.net/blog/2009/winter-in-paris-is-not-funny/<p>This week I arrived to the place where I will be working the following two years: Neurospin.</p> <img alt="" src="http://farm5.static.flickr.com/4042/4206517312_e35b7fa55d_m.jpg" /> <p>It's a research center located 20 km from Paris, and so far things are going smoothly: the place is beautiful, work is great and food is excellent. Well OK, I do miss some …</p>Fabian PedregosaTue, 22 Dec 2009 19:36:00 +0100tag:fa.bianp.net,2009-12-22:/blog/2009/winter-in-paris-is-not-funny/General, Tecnologí­aLast days in Granadahttp://fa.bianp.net/blog/2009/last-days-in-granada/<p>Nice thing about winter in Granada is, that even in the coldest days, the sky is always blue.</p> <img alt="" src="http://farm3.static.flickr.com/2539/4180997669_aa5a45a949_m.jpg" /> Fabian PedregosaTue, 15 Dec 2009 23:42:00 +0100tag:fa.bianp.net,2009-12-15:/blog/2009/last-days-in-granada/Fotos, GeneralLearning, Machine Learninghttp://fa.bianp.net/blog/2009/learning-machine-learning/<p>My new job is about managing an open source package for machine learning in Python. I've had some experience with Python now, but I am a total newbie in the field of machine learning, so my first task will be to find a good reference book in the subject and …</p>Fabian PedregosaTue, 15 Dec 2009 23:34:00 +0100tag:fa.bianp.net,2009-12-15:/blog/2009/learning-machine-learning/General, Tecnologí­aMoving to Paris!http://fa.bianp.net/blog/2009/moving-to-paris/<p>I'm extremely glad that finally I am moving to Paris to work as part of the INRIA crew. I'll be working with <a class="reference external" href="http://gael-varoquaux.info/">Gael Varoquaux</a> and his team in an extremely cool Python related project (more to come on this in the following weeks). Granada has been a great place for …</p>Fabian PedregosaSat, 12 Dec 2009 02:07:00 +0100tag:fa.bianp.net,2009-12-12:/blog/2009/moving-to-paris/GeneralSummer of Code is overhttp://fa.bianp.net/blog/2009/summer-of-code-is-over/<p>Google Summer of Code program is officially over. It has been four months of intense work, exciting benchmarks and patch reviewing. It was a huge pleasure working with you guys! As for the project, I implemented a complete logic module and then an assumption system for sympy (sympy.logic, sympy …</p>Fabian PedregosaSat, 05 Sep 2009 12:21:00 +0200tag:fa.bianp.net,2009-09-05:/blog/2009/summer-of-code-is-over/General, sympy, Tecnologí­aSpeed improvements for ask() (sympy.queries.ask)http://fa.bianp.net/blog/2009/speed-improvements-for-ask-sympyqueriesask/<p>I managed to overcome the overhead in ask() that arises when converting between symbol and integer representation of sentences in conjunctive normal. The result went beyond what I expected. The test suite for the query module got 10x times faster in my laptop. From 26 seconds, it descended to an …</p>Fabian PedregosaThu, 20 Aug 2009 00:36:00 +0200tag:fa.bianp.net,2009-08-20:/blog/2009/speed-improvements-for-ask-sympyqueriesask/General, sympy, Tecnologí­aLogic module (sympy.logic): improving speedhttp://fa.bianp.net/blog/2009/logic-module-sympylogic-improving-speed/<p>Today I've been doing some speed improvements for the logic module. More precisely, I implemented an efficient internal representation for clauses in conjunctive normal form. In practice this means a huge performance boost for all problems that make use the function satisfiable() or dpll_satisfiable(). For example, test_dimacs.py has moved …</p>Fabian PedregosaTue, 18 Aug 2009 23:35:00 +0200tag:fa.bianp.net,2009-08-18:/blog/2009/logic-module-sympylogic-improving-speed/General, sympy, Tecnologí­aRefine modulehttp://fa.bianp.net/blog/2009/refine-module/<p><a class="reference external" href="http://git.sympy.org/?p=sympy.git;a=commit;h=dd679c2751ac0900c47302fd6187ae9eea60918f">This</a> commit introduced a new module in sympy: the refine module. The purpose of this module is to simplify expressions when they are bound to assumptions. For example, if you know that x&gt;0, then you can simplify abs(x) to x. This code was traditionally embedded into the core …</p>Fabian PedregosaMon, 17 Aug 2009 19:20:00 +0200tag:fa.bianp.net,2009-08-17:/blog/2009/refine-module/sympy, Tecnologí­aQuery module - finally in trunkhttp://fa.bianp.net/blog/2009/query-module-finally-in-trunk/<p>The query module is finally in the main SymPy repository. I made substantial changes since last post, most of them at the user interface level (thanks to Vinzent and Mateusz for many insightful comments). Main function is ask(), which replaces the old expression.is_* syntax. You can ask many things …</p>Fabian PedregosaMon, 10 Aug 2009 21:51:00 +0200tag:fa.bianp.net,2009-08-10:/blog/2009/query-module-finally-in-trunk/General, sympy, Tecnologí­adjango, change language settings dynamicallyhttp://fa.bianp.net/blog/2009/django-change-language-settings-dynamically/<p>After some failed attempts, I just found how to change the language settings dynamically in django, and I thought it could be useful to someone. Just use function activate() from django.utils.translation. For example: [cc lang=&quot;python&quot;] from django.utils.translation import activate activate('es-ES') [/cc] will change global …</p>Fabian PedregosaFri, 07 Aug 2009 16:12:00 +0200tag:fa.bianp.net,2009-08-07:/blog/2009/django-change-language-settings-dynamically/General, Tecnologí­acan we merge now, pleeease ?http://fa.bianp.net/blog/2009/can-we-merge-now-pleeease/<p>Three months after I began to write sympy.queries, I feel it's about time to include it in sympy's trunk, so today I sent for review <a class="reference external" href="http://groups.google.com/group/sympy-patches/browse_thread/thread/76dcdfd0994a1c81">4 patches that implement the complete query module</a>. It's been a lot of fun, but it has also caused me some headaches ... specially last …</p>Fabian PedregosaTue, 21 Jul 2009 22:36:00 +0200tag:fa.bianp.net,2009-07-21:/blog/2009/can-we-merge-now-pleeease/General, sympy, Tecnologí­aRefine module, proof of concepthttp://fa.bianp.net/blog/2009/refine-module-proof-of-concept/<p>The 0.6.5 release of SymPy is taking longer than expected because <a class="reference external" href="http://code.google.com/p/sympy/issues/detail?id=1521">some bugs in the testing framework</a>, so my query module is not merged into trunk (yet). In the meantime, I am implementing a refine module (very little code is available yet). The refine module implements a refine …</p>Fabian PedregosaThu, 09 Jul 2009 02:49:00 +0200tag:fa.bianp.net,2009-07-09:/blog/2009/refine-module-proof-of-concept/General, sympy, Tecnologí­aPreparing a new releasehttp://fa.bianp.net/blog/2009/preparing-a-new-release/<p>Last days I've been busy preparing <a class="reference external" href="http://groups.google.com/group/sympy/browse_thread/thread/88474cde3bc6e350#">the first public beta of SymPy 0.6.5</a>. Most of the time was spent solving a bug that made documentation tests fail under python2.4, but now that this is solved, I hope that by the end of the week we could have …</p>Fabian PedregosaTue, 30 Jun 2009 08:57:00 +0200tag:fa.bianp.net,2009-06-30:/blog/2009/preparing-a-new-release/General, sympy, Tecnologí­aEfficient DPLL algorithmhttp://fa.bianp.net/blog/2009/efficient-dpll-algorithm/<p>Background: DPLL is the algorithm behind SymPy's implementation of logic.inference.satisfiable After reading the original papers by Davis &amp; Putnam [1], I managed to implement a more efficient version of the DPLL algorithm. It is 10x times faster on medium-sized problems (40 variables), and solves some wrong result bugs [2 …</p>Fabian PedregosaSun, 28 Jun 2009 18:16:00 +0200tag:fa.bianp.net,2009-06-28:/blog/2009/efficient-dpll-algorithm/GeneralQueries and performancehttp://fa.bianp.net/blog/2009/queries-and-performance/<p>After some hacking on the queries module, I finally got it right without the <a class="reference external" href="http://fa.bianp.net/blog/?p=149">limitations of past versions</a>. You can check it out from my repo <a class="reference external" href="http://fa.bianp.net/git/sympy.git">http://fa.bianp.net/git/sympy.git</a>, branch master. It now relies even more on logic.inference.satisfiable(), which is just an implementation of …</p>Fabian PedregosaTue, 23 Jun 2009 00:02:00 +0200tag:fa.bianp.net,2009-06-23:/blog/2009/queries-and-performance/General, sympy, Tecnologí­aReading CNF fileshttp://fa.bianp.net/blog/2009/reading-cnf-files/<p><p>The DIMACS CNF file format is used to define a Boolean expression, written in conjunctive normal form, that may be used as an example of the satisfiability problem. The new logic module (sympy.logic) can read the content of a cnf file and transform it into a boolean expression suitable …</p></p>Fabian PedregosaSat, 20 Jun 2009 16:27:00 +0200tag:fa.bianp.net,2009-06-20:/blog/2009/reading-cnf-files/General, sympy, Tecnologí­aLogic module mergedhttp://fa.bianp.net/blog/2009/logic-module-merged/<p>Yesterday I finally merged the logic module in sympy's official master branch, and should be released together with SymPy 0.6.5. Next thing to do: profile the code and write some docs before the release.</p> Fabian PedregosaFri, 19 Jun 2009 12:23:00 +0200tag:fa.bianp.net,2009-06-19:/blog/2009/logic-module-merged/General, sympy, Tecnologí­aThe boolean satisfiability problemhttp://fa.bianp.net/blog/2009/the-boolean-satisfiability-problem/<p><p>Most annoying problem in my implementation of the query system is that it will not solve implications if the implicates are far away from each other. For instance, if the graph of known facts is something like this</p> <pre class="literal-block"> Integer ----&gt; Rational --&gt; Real --&gt; Complex ^ ^ | | | ------- | | Prime Even ^ | | MersennePrime </pre> <p>Then it will not know …</p></p>Fabian PedregosaMon, 15 Jun 2009 06:00:00 +0200tag:fa.bianp.net,2009-06-15:/blog/2009/the-boolean-satisfiability-problem/General, sympy, Tecnologí­aInitial implementation of the query systemhttp://fa.bianp.net/blog/2009/initial-implementation-of-the-query-system/<p>I sent <a class="reference external" href="http://groups.google.com/group/sympy-patches/browse_thread/thread/e56ceda0038b7c23">some patches</a> to sympy-patches with an initial implementation of the query system. You can check it out by pulling from my branch: <tt class="docutils literal">git pull <span class="pre">http://fa.bianp.net/git/sympy.git</span> master</tt> into your sympy repo. Some examples of what you can do (sample isympy session): <tt class="docutils literal">In [1 …</tt></p>Fabian PedregosaFri, 12 Jun 2009 06:36:00 +0200tag:fa.bianp.net,2009-06-12:/blog/2009/initial-implementation-of-the-query-system/General, sympy, Tecnologí­aAssumption system and automatic theorem proving. Should I be learning LISP ?http://fa.bianp.net/blog/2009/assumption-system-and-automatic-theorem-proving-should-i-be-learning-lisp/<p>This is the third time I attempt to write the assumption system. Other attempts could be described as me following the rule: “For any complex problem, there is always a solution that is simple, clear, and wrong.” My <a class="reference external" href="http://groups.google.com/group/sympy-patches/browse_thread/thread/b6fd5402e729f58/8006779044c41a17?lnk=gst&amp;q=fabian+assumptions#8006779044c41a17">first attempt</a> (although better than the current assumption system) did use very …</p>Fabian PedregosaWed, 03 Jun 2009 13:50:00 +0200tag:fa.bianp.net,2009-06-03:/blog/2009/assumption-system-and-automatic-theorem-proving-should-i-be-learning-lisp/General, sympy, Tecnologí­aHomenaje a Antonio Vega en La Perchahttp://fa.bianp.net/blog/2009/homenaje-a-antonio-vega-en-la-percha/<p>El pasado jueves estuvimos en La Percha tocando algunas canciones de Antonio Vega. El vídeo se lo ha currado <a class="reference external" href="http://retrovisor.net">mi padre</a> mezclando el sonido del directo con una grabación que hicimos en casa de Migue</p> <p><a class="reference external" href="http://vimeo.com/4926476">LOS ESCLAVOS: homenaje a Antonio Vega</a> from <a class="reference external" href="http://vimeo.com/user938253">Felipe Pedregosa</a> on <a class="reference external" href="http://vimeo.com">Vimeo</a>.</p> </p>Fabian PedregosaMon, 01 Jun 2009 15:34:00 +0200tag:fa.bianp.net,2009-06-01:/blog/2009/homenaje-a-antonio-vega-en-la-percha/Canciones, General, GrupoFun with the new Logic modulehttp://fa.bianp.net/blog/2009/fun-with-the-new-logic-module/<p><p>The logic module is slowly becoming useful. This week I managed to get some basic inference in propositional logic working. This should be enough for the assumption sysmtem (although having first-order inference would be cool). You can pull from my branch: `` git pull <a class="reference external" href="http://fa.bianp.net/git/sympy.git">http://fa.bianp.net/git/sympy.git …</a></p></p>Fabian PedregosaSun, 31 May 2009 23:16:00 +0200tag:fa.bianp.net,2009-05-31:/blog/2009/fun-with-the-new-logic-module/sympy, Tecnologí­aBoolean algebra, first stepshttp://fa.bianp.net/blog/2009/boolean-algebra-first-steps/<p><p>The first task for my Summer of Code project is to write a nice boolean algebra module. I wanted a clean module that follows SymPy's object model and that plays well with other objects. In practice this means that it should inherit from Basic and that it should behave well …</p></p>Fabian PedregosaFri, 15 May 2009 19:20:00 +0200tag:fa.bianp.net,2009-05-15:/blog/2009/boolean-algebra-first-steps/sympy, Tecnologí­aLogic modules in pythonhttp://fa.bianp.net/blog/2009/logic-modules-in-python/<p>As a prerequisite of my GSOC project I have to do some modifications on sympy's current logic module (see previous post), so I decided to go out and take a look at what others are doing in this area. <a class="reference external" href="http://aima.cs.berkeley.edu/python/logic.html">aima-python</a> is a project that tries to implement all algorithms found …</p>Fabian PedregosaMon, 11 May 2009 01:15:00 +0200tag:fa.bianp.net,2009-05-11:/blog/2009/logic-modules-in-python/sympy, Tecnologí­aGoogle Summer of Codehttp://fa.bianp.net/blog/2009/google-summer-of-code/<p>First post on my GSOC adventure. This year I got accepted in Google's summer of code program as student, and my job will be to implement <a class="reference external" href="http://socghop.appspot.com/student_project/show/google/gsoc2009/portland_state/t124024247737">the assumptions framework in SymPy</a>. Although the project officially is only about implementing an assumptions framework, I have to prepare the ground before the …</p>Fabian PedregosaThu, 23 Apr 2009 23:53:00 +0200tag:fa.bianp.net,2009-04-23:/blog/2009/google-summer-of-code/General, sympy, Tecnologí­aDjango and request.POSThttp://fa.bianp.net/blog/2009/django-and-requestpost/<p>I spent a lot of time trying to figure out why django removed the '+' character from the POST data retrieved via request.POST. Still don't know the reason of this behaviour, but using request.raw_post_data saved my day ...</p> Fabian PedregosaSat, 24 Jan 2009 00:27:00 +0100tag:fa.bianp.net,2009-01-24:/blog/2009/django-and-requestpost/General, Tecnologí­aCon la pasta por delante - día 2: Martoshttp://fa.bianp.net/blog/2008/con-la-pasta-por-delante-dia-2-martos/<p>Después de Mengíbar vino <a class="reference external" href="http://maps.google.com/maps?f=q&amp;hl=en&amp;geocode=&amp;q=martos,+jaen&amp;sll=37.0625,-95.677068&amp;sspn=43.393645,79.101563&amp;ie=UTF8&amp;t=h&amp;z=11&amp;g=martos,+jaen&amp;iwloc=addr">Martos</a>. En este caso se trataba del &quot;Blooms Day&quot;, un sitio para el que &quot;un pub irlandés&quot; es una descripción aceptable. Llegamos primero Oscar y yo, en una de esas raras ocasiones en que llegamos antes de tiempo (no hay explicación, simplemente sucedió), así que tuvimos …</p>Fabian PedregosaTue, 09 Dec 2008 18:20:00 +0100tag:fa.bianp.net,2008-12-09:/blog/2008/con-la-pasta-por-delante-dia-2-martos/GrupoEsclavosMi ordenadorhttp://fa.bianp.net/blog/2008/mi-ordenador/<p>Realmente mi ordenador no hace nada ... sólo le echo la culpa de todo</p> Fabian PedregosaThu, 27 Nov 2008 13:44:00 +0100tag:fa.bianp.net,2008-11-27:/blog/2008/mi-ordenador/GeneralCon la pasta por delante - Día cerohttp://fa.bianp.net/blog/2008/con-la-pasta-por-delante-dia-cero/<p>En la ciudad fabrican a las personas en serie. En el campo, los siguen haciendo a mano: los moldean, los secan al sol y luego los pintan, por eso son tan especiales. Primer concierto de la nueva gira en Mengíbar, y uno de los fines de semana más intensos que …</p>Fabian PedregosaTue, 04 Nov 2008 22:19:00 +0100tag:fa.bianp.net,2008-11-04:/blog/2008/con-la-pasta-por-delante-dia-cero/miscesclavosUn premio para Goyohttp://fa.bianp.net/blog/2008/un-premio-para-goyo/<p>Mi &quot;sosio&quot; de <a class="reference external" href="http://estudioslince.com">trabajo</a>, el gran <a class="reference external" href="http://angelsoler.net">Goyal</a>, acaba de ganar el <a class="reference external" href="http://www.elmundo.es/yodona/estaticas/especiales/2008/07/premio_carteles/votacion_previa.html">primer premio del concurso yodona</a>. Si al final voy a tener que tratarte con respeto y todo ... cuándo era que lo íbamos a celebrar?</p> Fabian PedregosaTue, 04 Nov 2008 20:19:00 +0100tag:fa.bianp.net,2008-11-04:/blog/2008/un-premio-para-goyo/GeneralLos viejos amigos ...http://fa.bianp.net/blog/2008/los-viejos-amigos/<p>Nuevo repertorio, nuevos arreglos. Nueva gira, nuevos lugares. Sin olvidarse de los viejos amigos.</p> <img alt="" src="http://farm4.static.flickr.com/3072/2983431025_c4bd631898.jpg" /> <p>Empezamos la gira esta vez en Mengíbar, y mañana jueves (30 de Octubre) <a class="reference external" href="http://www.fotolog.com/losesclavos/60863921">estaremos por la pecha</a>, celebrando la publicación del EP y el cumpleaños de Hugo! Felicidades!</p> Fabian PedregosaWed, 29 Oct 2008 15:41:00 +0100tag:fa.bianp.net,2008-10-29:/blog/2008/los-viejos-amigos/GeneralOSWL 2008http://fa.bianp.net/blog/2008/oswl-2008/<p>La verdad, me parece una suerte tener la Open Source World Conference tan cerquita.</p> <img alt="" src="http://farm4.static.flickr.com/3205/2960554829_985a0bd733.jpg" /> <p>Este año estuvo genial, sobre todo las exposiciones en el hall. Lo peor, que a algunas charlas no pude asisitir por falta de espacio ... bueno, eso y que perdí el autobús de vuelta. Sigo en Málaga …</p>Fabian PedregosaThu, 23 Oct 2008 19:56:00 +0200tag:fa.bianp.net,2008-10-23:/blog/2008/oswl-2008/Tecnologí­aCambiar el color de ls para terminales con fondo oscurohttp://fa.bianp.net/blog/2008/cambiar-el-color-de-ls-para-terminales-con-fondo-oscuro/<p>Por fin encontré la manera para no dejarme la vista intentando distinguir azul oscuro sobre negro. Se trata de añadir el código a tu .bash_profile y los directorios se te colorearán de un verde mucho más legible alias ls='ls --color' LS_COLORS='di=1:fi=0:ln=31:pi=5 …</p>Fabian PedregosaThu, 23 Oct 2008 19:48:00 +0200tag:fa.bianp.net,2008-10-23:/blog/2008/cambiar-el-color-de-ls-para-terminales-con-fondo-oscuro/miscTú a Fuengirola, yo a Californiahttp://fa.bianp.net/blog/2008/tu-a-fuengirola-yo-a-california/<p>Cosas que suceden. Me pierdo el concierto que más ilusión me hace de la temporada ...</p> <img alt="" src="http://grupododo.com/seo/wp-content/uploads/2008/07/fpw_2008.jpg" /> <p>Mientras, estaré en California en una boda (California el Estado, no el Club de la N-3). PD: algunas canciones del nuevo EP de versiones <a class="reference external" href="http://losesclavos.com">ya están en el MySpace</a>.</p> Fabian PedregosaMon, 21 Jul 2008 14:25:00 +0200tag:fa.bianp.net,2008-07-21:/blog/2008/tu-a-fuengirola-yo-a-california/General, GrupoCosas por hacer en esta vida ...http://fa.bianp.net/blog/2008/cosas-por-hacer-en-esta-vida/<ul class="simple"> <li>Escribir un libro</li> <li>Ganar un Grammi</li> <li>Beber de una fuente de chocolate (hecho)</li> </ul> <p><img alt="image0" src="http://farm4.static.flickr.com/3110/2604421039_8d5ab6fa67.jpg" /></p> Fabian PedregosaMon, 23 Jun 2008 21:31:00 +0200tag:fa.bianp.net,2008-06-23:/blog/2008/cosas-por-hacer-en-esta-vida/GeneralCambio de planes!http://fa.bianp.net/blog/2008/cambio-de-planes/<p>Al final el concierto de este sábado no es en la vogue sino en la sugarpop:</p> <img alt="" src="http://sp7.fotologs.net/photo/39/9/102/losesclavos/1213049156084_f.jpg" /> <p><a class="reference external" href="http://www.fotolog.com/losesclavos">Migue</a> se ha currado unos carteles estupendos (si te fijas, en el futbolín unos son del Granada y otros del Jerez xD), y aunque yo estoy de exámenes, estamos echando unos ensayos para que …</p>Fabian PedregosaTue, 10 Jun 2008 12:39:00 +0200tag:fa.bianp.net,2008-06-10:/blog/2008/cambio-de-planes/General, GrupoGraduado!http://fa.bianp.net/blog/2008/graduado/<img alt="" src="http://farm3.static.flickr.com/2217/2525461578_6510497a62.jpg" /> <p><a class="reference external" href="http://www.youtube.com/watch?v=uDcVWhuA6x0">(tb hay un vídeo)</a> Ahora, a seguir con mis estudios de psicocerámica y de cabeza a por el <a class="reference external" href="http://es.wikipedia.org/wiki/Premios_Ig_Nobel">ig-nobel</a>.</p> Fabian PedregosaSun, 01 Jun 2008 13:17:00 +0200tag:fa.bianp.net,2008-06-01:/blog/2008/graduado/GeneralTeloneando en la telonerahttp://fa.bianp.net/blog/2008/teloneando-en-la-telonera/<p>Este viernes (Los Esclavos) tuvimos el privelegio de telonear a Paul Collins, que se acercó hasta Armilla para dar un concierto en la Telonera. Para mí, éste fue unos de los conciertos en los que mejor toqué (tanto que Migue me tuvo que invitar luego a unas copas, aunque perdí …</p>Fabian PedregosaMon, 19 May 2008 00:20:00 +0200tag:fa.bianp.net,2008-05-19:/blog/2008/teloneando-en-la-telonera/General, GrupoLos Esclavos 2.0http://fa.bianp.net/blog/2008/los-esclavos-20/<p>Después del concierto en <a class="reference external" href="http://www.fotolog.com/losesclavos/48879793">Sevilla</a>, fin de semana esclavo grabando en <a class="reference external" href="http://es.wikipedia.org/wiki/Daimiel">Daimiel</a>, en La Mancha. Era mi primera vez grabando con Los Esclavos, y la verdad es que la cosa no pudo salir mejor, sonando bien y del tirón, sin mayores complicaciones. Al final serán 4 canciones que se colgarán …</p>Fabian PedregosaTue, 13 May 2008 17:02:00 +0200tag:fa.bianp.net,2008-05-13:/blog/2008/los-esclavos-20/miscesclavosY qué tal por Madrid? (concierto de Los Esclavos, febrero 2008)http://fa.bianp.net/blog/2008/y-que-tal-por-madrid-concierto-de-los-esclavos-febrero-2008/<p>El pasado finde me fui con los enfermos estos a la capital para medirnos en una de sus salas: la <a class="reference external" href="http://www.costelloclub.com/">Costello</a>. El concierto de Madrid fue francamente increíble, tocamos de puta madre, la gente respondió, y yo fue de las veces que más me he divertido tocando, aunque la verdad …</p>Fabian PedregosaMon, 18 Feb 2008 13:41:00 +0100tag:fa.bianp.net,2008-02-18:/blog/2008/y-que-tal-por-madrid-concierto-de-los-esclavos-febrero-2008/General, GrupoConcierto en Planta Baja (y en El Tren)http://fa.bianp.net/blog/2008/concierto-en-planta-baja-y-en-el-tren/<p>Por fin tocamos en Planta Baja!! Fue el pasado sábado 19 de Enero y la cosa salió bastante bien. Bastante bien teniendo en cuenta que era el primer concierto sin Aitor, nuestro vocalista y guitarra rítmico. El tío ya no se junta con nosotros desde que le dejamos una semana …</p>Fabian PedregosaWed, 23 Jan 2008 04:02:00 +0100tag:fa.bianp.net,2008-01-23:/blog/2008/concierto-en-planta-baja-y-en-el-tren/GrupoVideo de Madridhttp://fa.bianp.net/blog/2008/video-de-madrid/<p>Mi padre se ha currado un montaje para la canción &quot;Madrid&quot; que tocamos en la telonera, mezclándolo con imágenes de un ensayo.</p> Fabian PedregosaWed, 02 Jan 2008 17:52:00 +0100tag:fa.bianp.net,2008-01-02:/blog/2008/video-de-madrid/Canciones, General, GrupoCon vistas al Marhttp://fa.bianp.net/blog/2007/con-vistas-al-mar/<p> Qué pena que los romanos tengan solamente un cuello! Calígula, emperador romano, famoso por su condicta autoritaria y extravagante<div class="section" id="capitulo-i-yo-soy-yo"> <h2>Capítulo I: Yo soy yo</h2> <p>Otro día que cocino espagueti, y joder, cada día me saben peor. Al principio me lo curraba y solía echarle su poquito de carne, su queso …</p></div></p>Fabian PedregosaSat, 15 Dec 2007 00:05:00 +0100tag:fa.bianp.net,2007-12-15:/blog/2007/con-vistas-al-mar/General, HistoriasConcierto en la Telonerahttp://fa.bianp.net/blog/2007/concierto-en-la-telonera/<p>To wapo el concierto del pasado 24 de Noviembre en &quot;La Telonera&quot;. Sin duda fué el concierto en el que mejor tocamos hasta la fecha. Esta vez nos tocaba abrir la actuación, de forma que subimos al escenario a las 10:50 aproximadamente, con el escenario todavía medio vacío. Empezamos …</p>Fabian PedregosaMon, 26 Nov 2007 15:50:00 +0100tag:fa.bianp.net,2007-11-26:/blog/2007/concierto-en-la-telonera/Canciones, Fotos, General, GrupoLos Esclavoshttp://fa.bianp.net/blog/2007/los-esclavos/<p>Bueno, ha habido algunos cambios importantes últimamente. El primero es que nuestro bajista, Enri se ha roto la mano. Por lo visto estaba en plena orgía amateur cuando resbaló de la cama y el metacarpio dió contra el suelo, pulverizándose ambos en un largo invierno nuclear. La segunda es que …</p>Fabian PedregosaTue, 06 Nov 2007 14:16:00 +0100tag:fa.bianp.net,2007-11-06:/blog/2007/los-esclavos/Canciones, Fotos, General, GrupoProducciones Peligrosas - Finhttp://fa.bianp.net/blog/2007/producciones-peligrosas-fin/<p>Por fin tenemos los temas !!!. En principio nos dieron los temas sin masterizar, de modo que a estos temas les he improvisado yo una masterización. Cuando los chicos de producciones peligrosas nos lo pasen con su masterización cabe esperar que estén todavía un poco mejor.</p> <!-- .. _powered by **ODEO**: http://odeo.com/audio/15904433/view --> <!-- .. _powered by **ODEO**: http://odeo.com/audio/15904413/view --> <!-- .. _powered by **ODEO**: http://odeo.com/audio/15904393/view --> <!-- .. _powered by **ODEO**: http://odeo.com/audio/15904443/view --> Fabian PedregosaTue, 07 Aug 2007 10:54:00 +0200tag:fa.bianp.net,2007-08-07:/blog/2007/producciones-peligrosas-fin/Canciones, General, GrupoProducciones Peligrosas - Dia 4http://fa.bianp.net/blog/2007/producciones-peligrosas-dia-4/<p>Hemos tenido un parón larguillo debido a que nuestro técnico se puso enfermo, pero tras semana y media hemos retomado la grabación. Mientras tanto, en ese tiempo hemos puesto letra a un par de canciones nuevas. Yo creo que lo bueno de hoy ha sido precisamente que no a habido …</p>Fabian PedregosaWed, 18 Jul 2007 19:34:00 +0200tag:fa.bianp.net,2007-07-18:/blog/2007/producciones-peligrosas-dia-4/Canciones, General, GrupoProducciones Peligrosas - Dia 3http://fa.bianp.net/blog/2007/producciones-peligrosas-dia-3/<p>Otro día de puta madre en Producciones Peligrosas. De nuevo nos grabó Pablo, con quien nos encontramos realmente muy a gusto y al parecer todo salió bien. Yo terminé de grabar las guitarras a primera hora, doblé alguna que otra guitarra más y por fin Aitor y Mar pudieron ponerse …</p>Fabian PedregosaThu, 05 Jul 2007 18:03:00 +0200tag:fa.bianp.net,2007-07-05:/blog/2007/producciones-peligrosas-dia-3/GeneralProducciones Peligrosas - Dia 2http://fa.bianp.net/blog/2007/producciones-peligrosas-dia-2/<p>HOY HA SIDO LA OSTIA (tiatiatia)! Pués eso, ya más calmados, con todo un día por delante, hoy nos ha dado tiempo de terminar de grabar la canción que dejamos a medias (Mono Azul), grabar las otras dos pendientes y arreglar Nunca Perder que había quedado un poco de aquella …</p>Fabian PedregosaWed, 04 Jul 2007 20:04:00 +0200tag:fa.bianp.net,2007-07-04:/blog/2007/producciones-peligrosas-dia-2/General, GrupoProducciones Peligrosas - Dia 1http://fa.bianp.net/blog/2007/producciones-peligrosas-dia-1/<p>Hoy ha sido nuestro primer día de grabación de la maqueta en los estudios &quot;Producciones peligrosas&quot;. Lo primero de todo es decir que las instalaciones son acojonantes. Tienen una sala con paredes de piedra que es la leche para grabar baterías y una sala de control con una mesa de …</p>Fabian PedregosaTue, 03 Jul 2007 20:36:00 +0200tag:fa.bianp.net,2007-07-03:/blog/2007/producciones-peligrosas-dia-1/General, GrupoProducciones Peligrosashttp://fa.bianp.net/blog/2007/producciones-peligrosas/<p>Ya es definitivo, el 3 de Julio entramos a grabar nuestra primera maqueta de estudio (las demás son caseras). Será en Producciones Peligrosas, un estudio situado en Peligros (Granada) en el que han Grabado Jose Ignacio Lapido, Mamá Ladilla, Sr. Chinarro, Lori Meyers y muchos más. En principio serán 4 …</p>Fabian PedregosaFri, 15 Jun 2007 21:12:00 +0200tag:fa.bianp.net,2007-06-15:/blog/2007/producciones-peligrosas/General, GrupoConcurso Casanuevahttp://fa.bianp.net/blog/2007/concurso-casanueva/<p>Ayer estuvimos en el concurso de las fiestas de Casanueva (Granada, anejo de Pinos Puente). Lo ganó finalmente <a class="reference external" href="http://www.myspace.com/baddagranada">DAbba</a> (muy merecidamente), pero nos lo pasamos de puta madre. Además creo que gracias a un contacto que hicimos igual tenemos algún conciertillo en verano. Pués eso, y me voy a estudiar …</p>Fabian PedregosaMon, 11 Jun 2007 09:47:00 +0200tag:fa.bianp.net,2007-06-11:/blog/2007/concurso-casanueva/General, GrupoFotos concierto en El Bunkerhttp://fa.bianp.net/blog/2007/fotos-concierto-en-el-bunker/<p>Al pasado concierto vino nuestro amigo FERMIN (amigo de Enri sobre todo), y nos hizo unas espectaculares fotos. Se pueden ver todas <a class="reference external" href="http://www.flickr.com/photos/fseoane/tags/bunker/">aquí</a></p> <p><img alt="foto_concierto" src="http://farm2.static.flickr.com/1151/532875942_6ed994247d.jpg" /></p> <p>Gracias Fermín!!</p> Fabian PedregosaWed, 06 Jun 2007 10:13:00 +0200tag:fa.bianp.net,2007-06-06:/blog/2007/fotos-concierto-en-el-bunker/miscfotosdodoConcierto 2 de junio en &quot;El bunquer&quot;http://fa.bianp.net/blog/2007/concierto-2-de-junio-en-quotel-bunquerquot/<p>Recordaros que este sábado damos un concierto en la sala &quot;El bunquer&quot; en Granada junto a Bonzo. Estos son los curradísimos carteles que han preparado para el evento Aitor y Enri:</p> <img alt="" src="http://grupododo.com/seo/wp-content/uploads/2007/05/cartel_2_junio_07.jpg" /> <p>Por cierto que el viernes pasado dimos un concierto bastante chulo en casanueva-zujaira( <a class="reference external" href="http://www.flickr.com/photos/fseoane/tags/casanueva/">aquí</a> voy a empezar a subir …</p>Fabian PedregosaThu, 31 May 2007 17:10:00 +0200tag:fa.bianp.net,2007-05-31:/blog/2007/concierto-2-de-junio-en-quotel-bunquerquot/General, GrupoEl sol no se pone en Granadahttp://fa.bianp.net/blog/2007/el-sol-no-se-pone-en-granada/<p>Señores, ya hemos colgado en la web nuestra última canción, <a class="reference external" href="http://odeo.com/audio/11285383/view">powered by **ODEO**</a> dedicada a los aficionados del Granada CF. Seguramente ésta será la última producción casera que hagamos, pues estamos contactando con estudios de grabación para hacer nuestra MMQTC (Maqueta de la Muerte Que Te Cagas). Ale, a cascarlo …</p>Fabian PedregosaThu, 03 May 2007 23:46:00 +0200tag:fa.bianp.net,2007-05-03:/blog/2007/el-sol-no-se-pone-en-granada/Canciones, General, GrupoPretty printinghttp://fa.bianp.net/blog/2007/pretty-printing/<p>Thanks to a patch by Jurjen Bos (with some additions &amp; modifications by me) we now got pretty printing in sympy. To see some examples, running it from isympy (you need sympy from svn):</p> <pre class="literal-block"> In [1]: pprint x**2 +x +1 ------&gt; pprint(x**2 +x +1) 2 1+x+x In …</pre>Fabian PedregosaSun, 29 Apr 2007 10:26:00 +0200tag:fa.bianp.net,2007-04-29:/blog/2007/pretty-printing/General, Tecnologí­aConcierto en la cárcel.http://fa.bianp.net/blog/2007/concierto-en-la-carcel/<p>Esta mañana nos fuimos el grupo al completo a la prisión de albolote con alumnos de magisterio. Ellos (los alumnos de magisterio) iban a hacer una especie de prácticas que consistían en motivar a los presos a base de juegos, y nosotros íbamos porque después de los juegos dábamos un …</p>Fabian PedregosaThu, 19 Apr 2007 16:33:00 +0200tag:fa.bianp.net,2007-04-19:/blog/2007/concierto-en-la-carcel/General, GrupoHashinghttp://fa.bianp.net/blog/2007/hashing/<p>Today I spent some time thinking about hashing in <a class="reference external" href="http://code.google.com/p/sympy">SymPy</a>. Hashing is a central part of sympy and is implemented in the core. Now you might be thinking why is hashing so important in a CAS (Computer Algebra System) ... I'll try to explain: when you do things like &quot;x+1 …</p>Fabian PedregosaThu, 19 Apr 2007 01:59:00 +0200tag:fa.bianp.net,2007-04-19:/blog/2007/hashing/Tecnologí­aNoches de solhttp://fa.bianp.net/blog/2007/noches-de-sol/<p>La semana pasada intentamos grabar a toda ostia nuestra última canción, que habla del Granada CF, de forma que nos pusimos a ponerle letra a toda ostia y grabamos en el mismo día (gracias Recius por el esfuerzo). Luego escuchando las pistas nos dimos cuenta que lo podemos hacer un …</p>Fabian PedregosaMon, 26 Mar 2007 21:43:00 +0200tag:fa.bianp.net,2007-03-26:/blog/2007/noches-de-sol/GrupoSymPy 0.3http://fa.bianp.net/blog/2007/sympy-03/<p>No lo he comentado aquí­, pero llevo cerca de un mes trabajando en un proyecto de software libre llamado <a class="reference external" href="http://code.google.com/p/sympy">SymPy</a>. Pretende convertirse en un sistema de algebra, tal como Mathematica o Maple, pero escrito en Python y, por supuesto, para ser utilizado desde Python.</p> Fabian PedregosaSun, 25 Mar 2007 13:33:00 +0200tag:fa.bianp.net,2007-03-25:/blog/2007/sympy-03/Tecnologí­aYo no soy sosohttp://fa.bianp.net/blog/2007/yo-no-soy-soso/<p>es capacidad de sí­ntesis.</p> Fabian PedregosaSat, 24 Feb 2007 21:25:00 +0100tag:fa.bianp.net,2007-02-24:/blog/2007/yo-no-soy-soso/GeneralNYhttp://fa.bianp.net/blog/2007/ny/<p>Las típicas fotos de cuando vas a Nueva York.</p> <p><a class="reference external" href="http://www.flickr.com/photos/fseoane/397692372/">http://www.flickr.com/photos/fseoane/397692372/</a></p> Fabian PedregosaWed, 21 Feb 2007 18:00:00 +0100tag:fa.bianp.net,2007-02-21:/blog/2007/ny/miscpicturesLas últimas cancioneshttp://fa.bianp.net/blog/2007/las-ultimas-canciones/<p>Ayer por primera vez metimos una voz sintetizada a una canción nuestra. Se trata de un cuarteto de cuerda, queda algo parecido a la intro de &quot;Eleanor Rigby&quot; (aunque obviamente todavia no lo alcanza en cuanto a calidad). En principio procedemos con mucha cautela, no queremos joder las canciones por …</p>Fabian PedregosaSat, 20 Jan 2007 11:54:00 +0100tag:fa.bianp.net,2007-01-20:/blog/2007/las-ultimas-canciones/General, GrupoParche para CLNhttp://fa.bianp.net/blog/2007/parche-para-cln/<p>Cuidado!, esta entrada habla de informática. Antes tenía un blog aparte para hablar de estas cosas, pero paso de mantener dos blogs, de forma que lo cuento aquí, y al que no le interese el tema puede decírmelo a través de <a class="reference external" href="http://www.gospelway.com/spanish/help_troubles-spa.htm">esta página</a> Pues resulta que hoy estoy como unas …</p>Fabian PedregosaThu, 18 Jan 2007 22:55:00 +0100tag:fa.bianp.net,2007-01-18:/blog/2007/parche-para-cln/Tecnologí­aThereminhttp://fa.bianp.net/blog/2006/theremin/<p>El <a class="reference external" href="http://es.wikipedia.org/wiki/Therem%C3%ADn">theremin</a> es un soviético un tanto estrafalario. Resulta que no solo es una curiosidad de frikis (la cagaste de nuevo, Baluba!), ya que genios como Beach Boys lo han usado por ejemplo en este single corrosivo (el theremin empieza en el segundo 26):</p> Fabian PedregosaWed, 20 Dec 2006 23:42:00 +0100tag:fa.bianp.net,2006-12-20:/blog/2006/theremin/GeneralPaul Simonhttp://fa.bianp.net/blog/2006/paul-simon/<p>No debía tener más de de 14 años cuando mi padre puso en la minicadena un CD que le agradaba bastante: &quot;Graceland&quot;, de Paul Simon.</p> <p>Ese disco me taladró la cabeza como una bala y Paul Simon se convirtió en mi ídolo (luego vendría No Doubt y otros más modernos …</p>Fabian PedregosaWed, 13 Dec 2006 09:21:00 +0100tag:fa.bianp.net,2006-12-13:/blog/2006/paul-simon/miscmusicDOdo en la radiohttp://fa.bianp.net/blog/2006/dodo-en-la-radio/<p>Hace unos meses (junio del 2006) nos llamaron de la radio para grabar una entrevista. La hicimos, y ahora el chico que nos la hizo (gracias tio!) nos la ha pasado para que podamos compartirla con nuestra legión de seguidores lobotomizados. Si queréis escucharla , seguid los enlaces: <a class="reference external" href="http://odeo.com/audio/3146583/view">Parte 1</a> <a class="reference external" href="http://odeo.com/audio/3146643/view">Parte …</a></p>Fabian PedregosaThu, 23 Nov 2006 20:56:00 +0100tag:fa.bianp.net,2006-11-23:/blog/2006/dodo-en-la-radio/General, GrupoUna carta mashttp://fa.bianp.net/blog/2006/una-carta-mas/<p>La última canción que hemos grabado en directo en el local de ensayo: <a class="reference external" href="http://odeo.com/audio/2534393/view">powered by **ODEO**</a> Te la puedes descargar de <a class="reference external" href="/canciones/2006/una_carta_mas.mp3">aquí</a> (licencia <a class="reference external" href="http://creativecommons.org/licenses/by-nc-nd/2.5/">Creative Commons</a>). Actualmente estoy trabajando en la nueva web, así que pronto habrá muchas más novedades. <strong>Actualización (domingo 12 de nov):</strong> he vuelto a masterizar la canción …</p>Fabian PedregosaSat, 11 Nov 2006 18:58:00 +0100tag:fa.bianp.net,2006-11-11:/blog/2006/una-carta-mas/miscdodoInfiltradoshttp://fa.bianp.net/blog/2006/infiltrados/<p>Si habéis visto infiltrados, recordaréis una canción con gaitas y baterí­a que se repite un par de veces en la pelí­cula. No aparece en la BSO, sin embargo, pero yo la he encontrado en youtube. Se llama &quot;I'm shipping up to boston&quot; y ya apareció en la película …</p>Fabian PedregosaSat, 11 Nov 2006 13:25:00 +0100tag:fa.bianp.net,2006-11-11:/blog/2006/infiltrados/GeneralLoquillo es el héroe sincerohttp://fa.bianp.net/blog/2006/loquillo-es-el-heroe-sincero/<p>No hay duda LOQUILLO es la caña, todavía no entiendo porqué no hay más imitadores suyos.</p> Fabian PedregosaThu, 02 Nov 2006 16:53:00 +0100tag:fa.bianp.net,2006-11-02:/blog/2006/loquillo-es-el-heroe-sincero/GeneralLa evolución de los mandrileshttp://fa.bianp.net/blog/2006/la-evolucion-de-los-mandriles/<p>Erase una vez una tribu primitiva de monos. El macho dominante (yo) le dijo al típico mono del culo rojo que se la menea como si nada (aitor) :</p> <p>&quot;Oyess, si grabamos las canciones en directo terminaríamos antes&quot;</p> <p>Rápidamente aquellos apestosos mandriles se dieron cuenta de lo gilipollas que eran, se …</p>Fabian PedregosaWed, 01 Nov 2006 22:57:00 +0100tag:fa.bianp.net,2006-11-01:/blog/2006/la-evolucion-de-los-mandriles/miscdodoGran crackhttp://fa.bianp.net/blog/2006/gran-crack/<p>Bueno, esta semana se la ha pasado Aitor en mi casa y hemos tenido tiempo de grabar una canción. Es la primera canción grabada en pequeño albion, y como verás suena más profesional aque anteriores grabaciones y tiene unos coros de Mar que te comes el asfalto. Todavía hay algunos …</p>Fabian PedregosaFri, 21 Jul 2006 14:16:00 +0200tag:fa.bianp.net,2006-07-21:/blog/2006/gran-crack/Canciones, General, GrupoEntrada insuperablemente absurda (Felicidades Mar)http://fa.bianp.net/blog/2006/entrada-insuperablemente-absurda-felicidades-mar/<p>La vida es una ton-ton-tombola, la vida es una ton-ton-tombola, aaaaa--aiaaaaa La vida es una ton-ton-tombola, La vida es una ton-ton-tombola, La vida es una ton-ton-tombola,</p> Fabian PedregosaSat, 17 Jun 2006 11:30:00 +0200tag:fa.bianp.net,2006-06-17:/blog/2006/entrada-insuperablemente-absurda-felicidades-mar/GeneralFin de temporadahttp://fa.bianp.net/blog/2006/fin-de-temporada/<p>Las últimas semanas han sido muy intensas, y en Musik-7 dimos por concluida la temporada de conciertos hasta el próximo curso (aunque si nos sale algo no creo que lo rechacemos). Ahora es momento de hacer nuevas canciones y grabar de una puta vez la maqueta. Muchas gracias a todos …</p>Fabian PedregosaFri, 26 May 2006 14:27:00 +0200tag:fa.bianp.net,2006-05-26:/blog/2006/fin-de-temporada/General, Grupolavin compae festivalhttp://fa.bianp.net/blog/2006/lavin-compae-festival/<p>El concierto de anoche (el lavin compae festival) estuvo de puta madre. Nos lo pasamos corrosivamente y además pudimos conocer a un montón de grupos, con los que charlamos y aprendimos un montón. Por otro lado, parece que le tengo alergia a los técnicos. En los únicos dos conciertos en …</p>Fabian PedregosaSat, 20 May 2006 14:22:00 +0200tag:fa.bianp.net,2006-05-20:/blog/2006/lavin-compae-festival/Fotos, General, GrupoSiempre hacia Albionhttp://fa.bianp.net/blog/2006/siempre-hacia-albion/<p>A la mierda!. Perdón, ha sido culpa mía. De todas formas, esto sale de puta pena, así seguro que nos mandan todos a la mierda, el que nos metió en el cartel, el que nos dejó tocar antes que ellos y el que no paraba de oler margaritas. Venga, una …</p>Fabian PedregosaTue, 16 May 2006 13:05:00 +0200tag:fa.bianp.net,2006-05-16:/blog/2006/siempre-hacia-albion/General, GrupoUn héroe para las ratashttp://fa.bianp.net/blog/2006/un-heroe-para-las-ratas/<p>Si realmente pudiera saber lo que otros piensan, esta vida sería un puto calvario. Recuerdo todas las veces que he juzgado a alquien como un verdadero capullo y luego termina siendo el mejor de los amigos. Al hijo del frutero siempre lo taché de subnormal cuando en realidad es un …</p>Fabian PedregosaWed, 15 Mar 2006 23:29:00 +0100tag:fa.bianp.net,2006-03-15:/blog/2006/un-heroe-para-las-ratas/mischistoriasDOdo en el cinehttp://fa.bianp.net/blog/2006/dodo-en-el-cine/<p>Es curioso como el DOdo aparece en más lugares de los que me esperaba. Por ejemplo, hay una película de 1938: &quot;Porky in the Wackyland&quot;, en la que el DOdo es un personaje principal. La trama de la película comienza cuando le piden a Porky Pig que capture al último …</p>Fabian PedregosaMon, 27 Feb 2006 20:34:00 +0100tag:fa.bianp.net,2006-02-27:/blog/2006/dodo-en-el-cine/GeneralFotos conciertohttp://fa.bianp.net/blog/2006/fotos-concierto/<img alt="" src="http://static.flickr.com/26/97100635_e6bed7741c_m.jpg" /> <p>Hey pirsonas. Ya están <a class="reference external" href="http://www.flickr.com/photos/fseoane/sets/72057594061166161/">aquí</a> las fotos del pasado concierto que me ha mandado nuestra amiga Blanca. Y ya que escribo esta entrada no puedo resistirme de decir que pronto (16 de marzo) estaremos repitiendo en la misma sala. En algún momento Aitor pondrá más información en la página oficial …</p>Fabian PedregosaWed, 08 Feb 2006 13:04:00 +0100tag:fa.bianp.net,2006-02-08:/blog/2006/fotos-concierto/Fotos, General, GrupoTablatura Albionhttp://fa.bianp.net/blog/2006/tablatura-albion/<p>El el último disco de Babyshambles hay una canción que simplemente es demasiado buena para ser real. No encontré tablatura, así que saqué algunos acordes. En realidad creo que toca toda la canción medio tono más alto, no se, cuando me compre una cejilla lo averiguo: Los acordes que utilizo …</p>Fabian PedregosaFri, 27 Jan 2006 22:12:00 +0100tag:fa.bianp.net,2006-01-27:/blog/2006/tablatura-albion/General, TablaturasAlbionhttp://fa.bianp.net/blog/2005/albion/<p>Esta última semana hicimos la primera ronda de dejar la maqueta en pubes (sí, pubes, ¿pasa algo?), a ver si podemos dar algún concierto en granada y de paso descargar inquietud acumulada. Y finalmente nos dijeron que sí, <a class="reference external" href="http://losmauricios.net/?p=22">aquí</a> está la info. Aparte de eso, hoy ha sido un …</p>Fabian PedregosaTue, 20 Dec 2005 23:15:00 +0100tag:fa.bianp.net,2005-12-20:/blog/2005/albion/GeneralCuidado!!!, soy un gilipollas del FBI!!http://fa.bianp.net/blog/2005/cuidado-soy-un-gilipollas-del-fbi/<p>JAJA!!!. Esta vez me he adelantado a todos!!!. Teneis que escuchar la última canción, <a class="reference external" href="http://losmauricios.net/canciones/sale_el_sol.mp3">Sale el sol</a>. Para esta canción finalmente Aitor y yo hemos descubierto para que sirven muchos de los botones del programa en el que grabamos las canciones, y resulta que todas esas mariconaditas que casi ni …</p>Fabian PedregosaWed, 30 Nov 2005 00:51:00 +0100tag:fa.bianp.net,2005-11-30:/blog/2005/cuidado-soy-un-gilipollas-del-fbi/General, GrupoMaqueta, negocios y salir en la puta radio.http://fa.bianp.net/blog/2005/maqueta-negocios-y-salir-en-la-puta-radio/<p>Otra vez me pongo el gorro de gnomo y salgo yo a contar mi vida. Primer asunto: Es la última vez que hago una entrada diciendo gilipolleces del tipo &quot;Hoy es el cumple de ... . Felicidades&quot;, porque luego es cumple de otra persona y se mosquea al no has hecho la …</p>Fabian PedregosaWed, 16 Nov 2005 22:25:00 +0100tag:fa.bianp.net,2005-11-16:/blog/2005/maqueta-negocios-y-salir-en-la-puta-radio/General, GrupoCumpleaños de un líderhttp://fa.bianp.net/blog/2005/cumpleanos-de-un-lider/<p>Aunque nos vamos a ver a la hora de comer, quisiera felicitar desde aquí a nuestro gran co-<a class="reference external" href="http://aitor.losmauricios.net">líder</a>, el cual es omnipresente, omnipotente y omnívoro. Y esto me recuerda a que hace un mes fue el cumpleaños del genial <a class="reference external" href="http://enri.losmauricios.net">Enri</a> y no nos acordamos de felicitarlo. Todavía nos da …</p>Fabian PedregosaMon, 07 Nov 2005 09:56:00 +0100tag:fa.bianp.net,2005-11-07:/blog/2005/cumpleanos-de-un-lider/General, GrupoAlgo que contarhttp://fa.bianp.net/blog/2005/algo-que-contar/<p>Hoy Aitor ha subido a mi casa y hemos terminado la producción de nuestra canción <a class="reference external" href="http://losmauricios.net/canciones/hola.mp3">hola</a>, la primera grabación en condiciones que subimos a la página. Al final hemos optado por meter el mínimo de efectos, de forma que la mayoría de las pistas han aparecen tal cual fueron grabadas …</p>Fabian PedregosaFri, 04 Nov 2005 01:11:00 +0100tag:fa.bianp.net,2005-11-04:/blog/2005/algo-que-contar/General, GrupoLas flores en el reformatorio, los mauricios en el campohttp://fa.bianp.net/blog/2005/las-flores-en-el-reformatorio-los-mauricios-en-el-campo/<p>Amigos: se terminó el garrapiñarles dinero a mis padres, a partir de ahora y gracias a mi amigo <a class="reference external" href="http://blog.zugaldia.org/">Zugaldia</a>, he conseguido un trabajillo en la revista <a class="reference external" href="http://studiopress.es/productos/revistas/tp/tp.htm">Todo Programación</a> que me permitirá ir comprándome objetos de valor incalculable. Más noticias: hay rumores de que <a class="reference external" href="http://aitor.losmauricios.net">Aitor</a> se va a rapar la cabeza …</p>Fabian PedregosaFri, 16 Sep 2005 22:28:00 +0200tag:fa.bianp.net,2005-09-16:/blog/2005/las-flores-en-el-reformatorio-los-mauricios-en-el-campo/General, GrupoMuerte de una bandahttp://fa.bianp.net/blog/2005/muerte-de-una-banda/<p>Ayer fué un día triste porque me enteré que mi grupo favorito,<a class="reference external" href="http://www.thelibertines.org.uk/">The Libertines</a>, han decidido separarse. The Libertines son un grupo británico que han escrito algunas de las canciones más líricas y geniales que he escuchado. Para hacerlo todavía más dramático, el trasfondo de la historia cuenta los continuos …</p>Fabian PedregosaTue, 06 Sep 2005 13:33:00 +0200tag:fa.bianp.net,2005-09-06:/blog/2005/muerte-de-una-banda/General, GrupoThe Boss (El Jefe)http://fa.bianp.net/blog/2005/the-boss-el-jefe/<p>He tenido que vender algunos órganos, pero finalmente pude hacerme con una de las mejores distorsiones que he escuchado jamás. Tiene un sonido muy cálido, con un zumbido increíble, no como la caca de pedalera digital que tenía antes, que tenía un sonido metálico que no quiero volver a escuchar …</p>Fabian PedregosaThu, 28 Jul 2005 22:36:00 +0200tag:fa.bianp.net,2005-07-28:/blog/2005/the-boss-el-jefe/GeneralPrimer contacto con el exteriorhttp://fa.bianp.net/blog/2005/primer-contacto-con-el-exterior/<p>Giró la cabeza asfixiado por el calor. Los ojos se le iban llenando de sangre y no sabía cuánto podría aguantar en ese estado de ansiedad. Todo daba vueltas como un cafe cuando se remueve y apenas podía disimular las náuseas. El corazón se le iba acelerando por momentos y …</p>Fabian PedregosaWed, 08 Jun 2005 18:43:00 +0200tag:fa.bianp.net,2005-06-08:/blog/2005/primer-contacto-con-el-exterior/General, HistoriasHora de grabarhttp://fa.bianp.net/blog/2005/hora-de-grabar/<p>Bueno, el momento de la grabación por fin llegó. Ayer estuvimos grabando la batería. Conviene decir que nos quedamos bastante impresionados por lo bien que lo hizo <a class="reference external" href="http://mar.losmauricios.net">mar</a>. Lo suyo definitivamente es amor por el metrónomo. Ahí va una foto que hice mientras esperábamos para grabar: <img alt="antes de grabar" src="imag/mar-grabacion.jpg" /> Por cierto, hay un …</p>Fabian PedregosaThu, 05 May 2005 14:33:00 +0200tag:fa.bianp.net,2005-05-05:/blog/2005/hora-de-grabar/GeneralTemblad terricolashttp://fa.bianp.net/blog/2005/temblad-terricolas/<p>Hola queridos borelianos! Estuvimos al miércoles por fin grabando las guías para la futura maqueta. Eso consiste básicamente en tocar las canciones sin mucho detalle (pero con metrónomo), para luego poder guiarte cuando se graben las pistas por separado. Al final pudimos grabar 4 de las 5 canciones, y yo …</p>Fabian PedregosaThu, 28 Apr 2005 13:33:00 +0200tag:fa.bianp.net,2005-04-28:/blog/2005/temblad-terricolas/General, GrupoEl cielo es amapolahttp://fa.bianp.net/blog/2005/el-cielo-es-amapola/<img alt="" src="http://fabian.losmauricios.net/imag/amapola.jpg" /> <p>Los mauricios dan un giro respecto a todo lo que habían hecho anteriormente con la canción &quot;El cielo es amapola&quot;. Pero tranquilos, no se trata de una oda a las florecillas. Es más bien una amalgama de melancolía, ruido y pequeñas imperfecciones. Y sin embargo al final todo vuelve a …</p>Fabian PedregosaThu, 14 Apr 2005 18:49:00 +0200tag:fa.bianp.net,2005-04-14:/blog/2005/el-cielo-es-amapola/General, GrupoSeré tu esclavohttp://fa.bianp.net/blog/2005/sere-tu-esclavo/<p>BUSCO TRABAJO. PARA LO QUE SEA (menos disfrazarme de mofeta mientras reparto publicidad mientras bailo el baile del pimpollo). Soluciones garantizadas en fontanería, electrónica e informática (titulo homologado McGyver) <img alt="McGyver" src="imag/2005/macgyver.jpg" /> PD: he renovado el estilo de mi <a class="reference external" href="http://grupododo.com/seo/">gueb</a> y del <a class="reference external" href="http://grupododo.com/planeta/">planeta</a>, a ver qué sus parecen.</p> Fabian PedregosaMon, 11 Apr 2005 14:46:00 +0200tag:fa.bianp.net,2005-04-11:/blog/2005/sere-tu-esclavo/GeneralEn ocasiones veo Enrishttp://fa.bianp.net/blog/2005/en-ocasiones-veo-enris/<p>Ya <a class="reference external" href="http://images.google.es/images?q=tbn:oaxxsgj88i8J:galeon.hispavista.com/pakoperez/img/TioCachas.jpg">recuperado</a> y en plena posesión de mis facultades mentales y de mis esfínteres procederé a hablar un poco de mí. La semana santa se pasó casi sin enterarme, pués entre que la mitad de los días estábamos ensayando y la otra mitad he estado en casa de mi padre …</p>Fabian PedregosaTue, 29 Mar 2005 13:10:00 +0200tag:fa.bianp.net,2005-03-29:/blog/2005/en-ocasiones-veo-enris/General, GrupoDespistao y con fisura de radiohttp://fa.bianp.net/blog/2005/despistao-y-con-fisura-de-radio/<p>Anoche estuvimos en planta baja en el concierto de los despistaos. Lo cierto es que nos gustó bastante. Aquello sonaba bastante bien y la puesta en escena era realmente estupenda. <img alt="image0" src="http://losmauricios.net/album/albums/feb-2005/normal_imag0069.jpg" /> Y hubo tiempo incluso para que hiciera un trinfal solo en el escenario ( un solo es un solo aunque ya …</p>Fabian PedregosaWed, 09 Mar 2005 15:14:00 +0100tag:fa.bianp.net,2005-03-09:/blog/2005/despistao-y-con-fisura-de-radio/GeneralAlgo nuevo, algo distinto (y con un camello como mascota)http://fa.bianp.net/blog/2005/algo-nuevo-algo-distinto-y-con-un-camello-como-mascota/<p>Ya cualquiera tiene su propio blog, y casi siempre hay habilitada una sección en la que el personajillo habla de sí mismo contestando a preguntas típicas (o PUF, preguntas de uso frecuente). Pero lo que ahora MOLA QUE TE FOLLAS y es tope original es tener una sección de respuestas …</p>Fabian PedregosaThu, 10 Feb 2005 09:51:00 +0100tag:fa.bianp.net,2005-02-10:/blog/2005/algo-nuevo-algo-distinto-y-con-un-camello-como-mascota/GeneralQue piensas de lo del ... ??http://fa.bianp.net/blog/2005/que-piensas-de-lo-del/<p>Como bien dice aitor en en <a class="reference external" href="http://planeta.losmauricios.net">planeta</a>, ayer fué un ensayo memorable. Solamente añadir que Aitor tampoco cantó mal ... Volviendo a casa me puse a escuchar un disco de un grupo que escuché en Radio3 y me llamó la atención, se llaman <a class="reference external" href="http://www.emirkusturica-nosmoking.com/eng/index.html">Emir Kusturica &amp; The No Smoking Orchestra</a>. Si os …</p>Fabian PedregosaSun, 30 Jan 2005 12:58:00 +0100tag:fa.bianp.net,2005-01-30:/blog/2005/que-piensas-de-lo-del/GeneralBuscando gilipolleceshttp://fa.bianp.net/blog/2005/buscando-gilipolleces/<p>Recientemente encontré una página buenísiima en la que aparecen búsquedas raras que hace la gente en Internet. A continuación dejo una selección de algunas que me han gustado especialmente. &quot;como ser peon&quot; &quot;fotos de penes subliminales&quot; &quot;fotos de cangrejos gays&quot; &quot;ver camiones de bimbo&quot; &quot;por qué mi vida es una …</p>Fabian PedregosaMon, 24 Jan 2005 23:36:00 +0100tag:fa.bianp.net,2005-01-24:/blog/2005/buscando-gilipolleces/GeneralFeliz 2005 (se me olvidó avisarte)http://fa.bianp.net/blog/2005/feliz-2005-se-me-olvido-avisarte/<p>Tal vez no me reconozcas porque me acababa de duchar, pero ese chico tan guapo soy yo en la nochivieja que pasé con <a class="reference external" href="http://losmauricios.net">aitor</a>. <img alt="image0" src="images/feliz2005.jpg" /> Por cierto que en esa noche hicimos una nueva canción para el grupo que seguramente entrará en la maqueta que queremos grabar después de los exámenes …</p>Fabian PedregosaSun, 23 Jan 2005 00:01:00 +0100tag:fa.bianp.net,2005-01-23:/blog/2005/feliz-2005-se-me-olvido-avisarte/GeneralAmplificadores, reyes magos y hamburguesashttp://fa.bianp.net/blog/2004/amplificadores-reyes-magos-y-hamburguesas/<p>En estos días de navidad hemos subido ya un par de veces a tocar al nuevo local. Está en Santa Fé y lo cierto es que está muy bien. Entiéndeme, no es un local de lujo, pero al menos podemos hacer todo el ruido que queramos, tiene un equipo aceptable …</p>Fabian PedregosaFri, 31 Dec 2004 19:33:00 +0100tag:fa.bianp.net,2004-12-31:/blog/2004/amplificadores-reyes-magos-y-hamburguesas/GeneralEn el estudio de Andréshttp://fa.bianp.net/blog/2004/en-el-estudio-de-andres/<p>El pasado Jueves subimos al estudio de Andrés para tocar sobre un equipo profesional. Además, era la primera vez que tocábamos con batería y bajo. Lo cierto es que aquello sonaba bastante mal, a mí no me salían la mitad de los punteos, la voz desafinaba como un jabalí en …</p>Fabian PedregosaSat, 25 Dec 2004 16:37:00 +0100tag:fa.bianp.net,2004-12-25:/blog/2004/en-el-estudio-de-andres/GeneralUna imagen que se repite.http://fa.bianp.net/blog/2004/una-imagen-que-se-repite/<p>Hay una imgen que no puedo sacar de mi cerebro. En ella aparece <a class="reference external" href="http://aitor.losmauricios.net">Aitor</a> tal y como era antes de la operación de anginas: <img alt="Aitor-Dolly" src="images/aitor-dolly.jpg" /> A veces también aparece <a class="reference external" href="http://elrincondelangel.blogspot.com">Recio</a> vestido de plátano y gritando &quot;Fecúndameeee&quot; mientras corre por las praderas.</p> Fabian PedregosaFri, 03 Dec 2004 14:49:00 +0100tag:fa.bianp.net,2004-12-03:/blog/2004/una-imagen-que-se-repite/GeneralSin saber que en realidad debía llorarhttp://fa.bianp.net/blog/2004/sin-saber-que-en-realidad-debia-llorar/<p>Hace algún tiempo yo también tuve novia. Hací­amos las cosas que se suele hacer en pareja, ella encontraba fabuloso todo lo que yo hacía y yo me interesaba por sus cosas. A veces le tocaba alguna de mis canciones, una vez incluso le presté una cinta con una canción …</p>Fabian PedregosaTue, 30 Nov 2004 08:32:00 +0100tag:fa.bianp.net,2004-11-30:/blog/2004/sin-saber-que-en-realidad-debia-llorar/GeneralEl regresohttp://fa.bianp.net/blog/2004/el-regreso/<p><p>Bueno, ya regresé de Madrid, lugar donde di una pequeña charla sobre mis teorías de la posibilidad de construir barbacoas que funcionen con oxígeno líquido . También hubo ocasión para tratar el tema de los pollos. Mensaje subliminal: EL POLLO ES POLLO, y seguirá siendo pollo. No sirve de nada cabrearse …</p></p>Fabian PedregosaSat, 13 Nov 2004 19:34:00 +0100tag:fa.bianp.net,2004-11-13:/blog/2004/el-regreso/GeneralAITORhttp://fa.bianp.net/blog/2004/aitor/<p>Solo una cosa <strong>FELICIDADES AITOR</strong> Ya está.</p> Fabian PedregosaTue, 09 Nov 2004 14:59:00 +0100tag:fa.bianp.net,2004-11-09:/blog/2004/aitor/GeneralEl pollo es pollo y no come almendrashttp://fa.bianp.net/blog/2004/el-pollo-es-pollo-y-no-come-almendras/<p>El otro día estuvimos ensayando (sí, Mar sigue tocando los tambores tipo oblongo) y, como de construmbre, nos lo pasamos bastante bien. Estuvimos ultimando las nuevas canciones porque el sábado tocaremos para un conocido manager internacional que nos llevará de gira por toda Europa (era eso, ¿no Aitor?). También he …</p>Fabian PedregosaThu, 04 Nov 2004 17:34:00 +0100tag:fa.bianp.net,2004-11-04:/blog/2004/el-pollo-es-pollo-y-no-come-almendras/Generalpor telefonohttp://fa.bianp.net/blog/2004/por-telefono/<p>Tí­pica conversación telefónica: - Hola, está Guille ? - No, no está. - Pero, ¿está con Cristina? - No - ¿Está con su madre ? - No, no está en ninguna parte. Es entonces cuando te quedas pillado y no sabes qué decir. Te quedas pensando durante semanas, ¿qué nos ha querido decir Mauricio con éstas palabras …</p>Fabian PedregosaTue, 19 Oct 2004 13:42:00 +0200tag:fa.bianp.net,2004-10-19:/blog/2004/por-telefono/GeneralLos tiempos están cambiandohttp://fa.bianp.net/blog/2004/los-tiempos-estan-cambiando/<p>Nuestras canciones ya no son lo que eran. Cada dí­a <a class="reference external" href="http://aitor.losmauricios.net">Aitor</a> y yo nos compenetramos mejor y conseguimos mejores melodias, aunque en ese aspecto yo soy bastante conservador, el innovador es él. Prácticamente cada vez que quedamos sale una nueva canción. <a class="reference external" href="http://mar.losmauricios.net">Mar</a> también contribuye en gran parte a esta …</p>Fabian PedregosaTue, 12 Oct 2004 17:53:00 +0200tag:fa.bianp.net,2004-10-12:/blog/2004/los-tiempos-estan-cambiando/GeneralConspiración Internacionalhttp://fa.bianp.net/blog/2004/conspiracion-internacional/<p>Por si no lo sabes, hay una conspiración internacional contra nuestro grupo</p> <p>Por ejemplo, el de las guitarras nos hizo un precio sospechosamente bajo y ahora no le llegan las dichosas guitarras. Vamos a pedir precios a un estudio de grabación y resulta que no lo saben porque el que …</p>Fabian PedregosaThu, 30 Sep 2004 00:00:00 +0200tag:fa.bianp.net,2004-09-30:/blog/2004/conspiracion-internacional/grupo