Okeydokey! I'll try it out and let you know if the generalization performance improves. It's already pretty darn good for most classes, but I'll focus on a hard one.
Thanks, P At Tue, 13 Jan 2009 22:00:25 -0500, Yaroslav Halchenko wrote: > > I guess it wouldn't be too hard to figure it out empirically (atm I > can't recall what was actually done -- I think indeed they are not > corrected for HRF since Haxby was interested in block averages): > just shift labels by 1,2,3 samples and see when the generalization > performance is the best ;) should be 1 line addition to smth like > http://www.pymvpa.org/ex/start_easy.html > > On Tue, 13 Jan 2009, Per B. Sederberg wrote: > > > Hi Everybody: > > > I just wanted to check to see whether the labeled samples (listed in > > attributes_literal.txt) in the Haxby et al. (2001) example subject are > > shifted to the peak hemodynamic response or if one must perform some > > type of shifting (i.e., convolving with HRF) to line up the samples > > with the presented image. > > > Although I assume they are shifted because none of the examples > > perform this step to line up the labels with one would expect the peak > > brain activity, I was unable to confirm this from the download page: > > http://www.pymvpa.org/examples.html#exampledata > > > Thanks, > > Per > > > _______________________________________________ > > Pkg-ExpPsy-PyMVPA mailing list > > Pkg-ExpPsy-PyMVPA@lists.alioth.debian.org > > http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa > > > -- > Yaroslav Halchenko > Research Assistant, Psychology Department, Rutgers-Newark > Student Ph.D. @ CS Dept. NJIT > Office: (973) 353-1412 | FWD: 82823 | Fax: (973) 353-1171 > 101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102 > WWW: http://www.linkedin.com/in/yarik > > _______________________________________________ > Pkg-ExpPsy-PyMVPA mailing list > Pkg-ExpPsy-PyMVPA@lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa _______________________________________________ Pkg-ExpPsy-PyMVPA mailing list Pkg-ExpPsy-PyMVPA@lists.alioth.debian.org http://lists.alioth.debian.org/mailman/listinfo/pkg-exppsy-pymvpa