On Fri, 28 Aug 2015, marco tettamanti wrote: > Dear all, > is it possible to obtain confusion matrices for all nodes with > "sphere_gnbsearchlight", as was suggested before with > "sphere_searchlight":
> slcvte = CrossValidation(clf, partitioner, errorfx=None, > postproc=ChainNode([Confusion(labels=fds.UT)])) > class KeepConfusionMatrix(Node): > def _call(self, fds): > out = np.zeros(1, dtype=object) > out[0] = (fds.samples) > return out > slcvte.postproc.append(KeepConfusionMatrix()) > slght = sphere_searchlight(slcvte, radius=slradius, space='voxel_indices', > nproc=4, postproc=mean_sample()) > slght_map = slght(fds) quick an possible partial reply 1. "not sure" -- if it pukes then probably not, although judging from the code I foresaw arbitrary shape of the errorfx output 2. but you could make sphere_gnbsearchlight to return labels (not errors) and then post-process to get those confusion matrices. Just specify errorfx=None to it (not to CV). But you could also try passing errorfx=ConfusionMatrixError and see how that goes Please share what you discover/end up with. mvpa2/tests/test_usecases.py has more of usecase demos for gnb searchlights which might come handy -- Yaroslav O. Halchenko, Ph.D. http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org Research Scientist, Psychological and Brain Sciences Dept. Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755 Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419 WWW: http://www.linkedin.com/in/yarik _______________________________________________ Pkg-ExpPsy-PyMVPA mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-exppsy-pymvpa
