thanks for all the helpful remarks! That's exactly what I wanted to know. However I am a bit surprised by the low performance of Elastic Net in comparison to logit (both using L1 regularization and test/training on the full dataset). Am I overseeing something obvious here?
acc enet: 69.0 acc logit: 100.0 iris = datasets.load_iris() X = iris.data y = iris.target idx=np.where(y!=2)[0] # select only labels 0 & 1 X=X[idx,:] y=y[idx,:] X /= X.std(0) clf = OneVsRestClassifier(ElasticNet(alpha=0., rho=0.)) y_pred = clf.fit(X,y).predict(X) print 'acc enet:',zero_one_score(y,y_pred)*100 clf = LogisticRegression(C=1., penalty='l1') y_pred = clf.fit(X,y).predict(X) print ' acc logit:', zero_one_score(y,y_pred)*100 Thanks in advance! Matthias On 2/27/12 10:13 AM, Mathieu Blondel wrote: > On Mon, Feb 27, 2012 at 6:06 PM, Matthias Ekman > <[email protected]> wrote: > >> do I use Elastic Net for classification in practice? > from sklearn.multiclass import OneVsRestClassifier > > clf = OneVsRestClassifier(ElasticNet(alpha=0.1, rho=0.7)) > > will work even for binary classification. > > Mathieu > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Scikit-learn-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Scikit-learn-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
