2013/1/8 Ronnie Ghose <[email protected]>: > Can anyone please tell me what I'm doing wrong? > > The example here > (http://scikit-learn.org/dev/modules/generated/sklearn.grid_search.GridSearchCV.html) > >>>> from sklearn import svm, grid_search, datasets >>>> iris = datasets.load_iris() >>>> parameters = {'kernel':('linear', 'rbf'), 'C':[1, 10]} >>>> svr = svm.SVC() >>>> clf = grid_search.GridSearchCV(svr, parameters) >>>> clf.fit(iris.data, iris.target) > ... > GridSearchCV(cv=None, > estimator=SVC(C=1.0, cache_size=..., coef0=..., degree=..., > gamma=..., kernel='rbf', max_iter=-1, probability=False, > shrinking=True, tol=...), > fit_params={}, iid=True, loss_func=None, n_jobs=1, > param_grid=..., > ...) > > gives .98 > > when i change svr and the parameters: > > > > from sklearn import svm, grid_search, datasets,linear_model > > > iris = datasets.load_iris() > parameters = {'alpha':[.0001,.001]} > sgd = linear_model.SGDRegressor() > clf = grid_search.GridSearchCV(sgd, parameters) > clf.fit(iris.data, iris.target) > print clf.best_score_ > > > > > suddenly I get > > > Traceback (most recent call last): > File "GridSearch_SGDRegressor.py", line 6, in <module> > clf.fit(iris.data, iris.target)
This does not really make sense to fit a regressor model on a classification problem (the integer targets does not have a total ordering meaning). > > File "/usr/local/lib/python2.7/dist-packages/sklearn/grid_search.py", line > 415, in fit > best_estimator.fit(X, y, **self.fit_params) > AttributeError: 'NoneType' object has no attribute 'fit' That looks like a bug. Could you open a new github issue? -- Olivier http://twitter.com/ogrisel - http://github.com/ogrisel ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 _______________________________________________ Scikit-learn-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
