On Mon, 29 Nov 2010, Jakob Scherer wrote: > > or did I misunderstand entirely? > Actually i wanted to ask: is it possible to get a higher performance > by feature selection?
yes! (given you have irrelevant features as well, or some times just redundant noisy ones) for a simple example just run doc/examples/clfs_examples.py and see effects of feature selections, or just look at Table 1 of our elderly paper http://dx.doi.org/10.1007/s12021-008-9041-y moreover, with improper (e.g. double-dipping) feature-selection you might get unrealistically good "performance" (once with incorrectly approached RFE I got 100% generalization across subjects without any alignment ;)) -- =------------------------------------------------------------------= Keep in touch www.onerussian.com Yaroslav Halchenko www.ohloh.net/accounts/yarikoptic _______________________________________________ Pkg-ExpPsy-PyMVPA mailing list Pkg-ExpPsy-PyMVPA@lists.alioth.debian.org http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa
