On Mon, 04 Nov 2013, Taku Ito wrote: > Oh! �I did in fact have one, though it's the Zscore-mapper (I had > previously thought I checked 'mapper' in res[1].a, but perhaps it came out > incorrectly). �Though I realize Z-score mapper probably doesn't have a > reverse mapper, and perhaps that's the issue? �Is there a workaround you > may be aware of?
hm -- it should not be just a zscore mapper but rather also the ones which lead to that point. (flattening, feature selection (you had a mask, right?)). please show print ds.a.mapper and if it is indeed only zscore -- then a code snippet which lead to that point. Inspect also either you had a correct mapper right after fmri_dataset > Thanks! > On Mon, Nov 4, 2013 at 10:48 AM, Yaroslav Halchenko > <[1][email protected]> wrote: > On Mon, 04 Nov 2013, Taku Ito wrote: > > � �Are all datasets supposed to have mappers? �My data set was loaded > > � �directly from a NIFTI file, using mvpa2.datasets.mri.fmri_dataset, > and > > � �when I loaded it there was no mapper attached, > it should be there under .a.mapper ... see e.g. > [2]http://www.pymvpa.org/tutorial_datasets.html#loading-fmri-data > for more information > > though I attributed it > > � �target values and chunks. �In other words, my original data set > also does > > � �not have any mappers. �Should I be manually attributing mappers to > my data > > � �set (e.g., the searchlight call or the z-scoring call) and attach > all > > � �those mappers as a Chain? > let's first figure out if you indeed didn't have any ;-) -- Yaroslav O. Halchenko, Ph.D. http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org Senior Research Associate, 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
