2012/6/17 Andreas Mueller <[email protected]>: > On 06/17/2012 01:24 PM, Lars Buitinck wrote: >> 2012/6/17 Andreas Mueller<[email protected]>: >>>> Any reason why we haven't implemented "multiclass" (OvR) predict_proba >>>> on SGDClassifier? >>>> >>> Maybe because it is not really meaningful? Would you do softmax there? >> Yes. Isn't that what LogisticRegression does too? >> > I'm a bit on the go right now and don't have time to look it up. I would > have expected LogisticRegression > to use Platt scaling. > As you said, the two-class version can be generalized but the > multi-class version > is not trained in a way that would be consistent with this probabilistic > model, I think.
I'm not totally sure - I've looked at the code (linear.cpp/predict_probability) and it seems that they just do the soft-max and no Platt scaling but I might have missed something. > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Scikit-learn-general mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general -- Peter Prettenhofer ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Scikit-learn-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
