[pymvpa] Example Dataset

Yaroslav Halchenko debian at onerussian.com
Wed Jan 14 03:00:25 UTC 2009


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

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-- 
Yaroslav Halchenko
Research Assistant, Psychology Department, Rutgers-Newark
Student  Ph.D. @ CS Dept. NJIT
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