On Sun, Nov 6, 2011 at 1:26 AM, Lars Buitinck <[email protected]> wrote: > 2011/11/6 Sami Liedes <[email protected]>: >> On Sun, Nov 06, 2011 at 12:22:37AM +0100, Lars Buitinck wrote: >>> With sparse data, you should use the indices=True argument to >>> StratifiedKFold. By default, it will return a boolean mask, which >>> cannot be used to index into a sparse matrix. >> >> Ah, didn't know of that option. Thanks. (Why does indexing into a >> sparse matrix with a boolean mask not fail with an error message but >> rather silently returns the entire matrix?) > > You'll have to ask the SciPy maintainers. > >> Unfortunately this still doesn't resolve the problem with sparse.SVC >> and GridSearchCV(njobs=10); I still get the same error message: >> >> ------------------------------------------------------------ >> File "libsvm.pyx", line 157, in >> sklearn.svm.sparse.libsvm.libsvm_sparse_train >> (sklearn/svm/sparse/libsvm.c:1924) >> ValueError: cannot resize this array: it does not own its data >> ------------------------------------------------------------ > > I can't reproduce this, but it seems like a bug in the sparse SVM > wrapper code. Maybe fabianp can have a look at this?
Indeed, there are a bunch of resize in the sparse bindings that shouldn't be there, I've opened an issue: https://github.com/scikit-learn/scikit-learn/issues/426 Fabian. > > -- > Lars Buitinck > Scientific programmer, ILPS > University of Amsterdam > > ------------------------------------------------------------------------------ > RSA(R) Conference 2012 > Save $700 by Nov 18 > Register now > http://p.sf.net/sfu/rsa-sfdev2dev1 > _______________________________________________ > Scikit-learn-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general > ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Scikit-learn-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
