I agree with you, Andy. It seems the right thing to do to address Olivier & Gilles' subsampling concern is to fix the subsampling, not allow the ensemble to add useless classifiers/do useless cross-validation folds.
On Fri, Aug 10, 2012 at 7:48 AM, Andreas Mueller <[email protected]> wrote: > No-one has any opinion on that? > > > > On 08/05/2012 10:01 PM, Andreas Mueller wrote: > > Hey everybody. > Recently I opened and issue suggesting that all classifiers should raise an > error if there is only one class present during training. > My reasoning was that there is no point in training a classifier, as they > usually won't learn anything meaningful and it > just wastes clock-cycles. > > Olivier and Gilles raise the issue that this might lead to problems when > doing sub sampling for > cross-validation and ensemble methods. > > What do you think? > You can read the arguments in the issue thread and some comments here. > > > Cheers, > Andy > > > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ 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
