[pymvpa] Fwd: Data import with pynifti

[Roberto Guidotti]

I have 855 images corresponding to a subject doing an experiment each image
corresponds to a TR of the experiment that should be analyzed.

I haven't only my images in Talairach space after basic preprocessing steps
(time, motion correction etc.), when I load my dataset I print scl_* values,
and I have my first image with the values cited above, and the rest with 0.0
value. After loading I have to zscore my images and proceed with other mvpa
steps. Am I wrong?

So, I have upgraded to 0.6 version!

Thank you
RG

2011/3/29 Yaroslav Halchenko <debian at onerussian.com>

> so, you have 1 image with scaling and the rest without scaling...
>
> does data from those images participate together in some analysis? e.g.
> do they all correspond to different functional runs which get loaded and
> no zscoring per run is invoked? then you might have a problem because in
> older versions of pymvpa values from the first values would be offset by
> 19 and divided by 17 (i.e. scaling was not applied).
>
> in any case you should be safe if you are using pymvpa 0.6.* or 0.4.7
>
> On Tue, 29 Mar 2011, Roberto Guidotti wrote:
>
> >      and what was "the right value"? in the first image?
>
> >    scl_slope = 17.0 and scl_inter = 19.0
> >    Probably I've misunderstood your ANNOUNCEMENT of the new release of
> the
> >    software!! I'm sorry
> --
> =------------------------------------------------------------------=
> Keep in touch                                     www.onerussian.com
> Yaroslav Halchenko                 www.ohloh.net/accounts/yarikoptic
>
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