[pymvpa] Found the problem (hopefully): suspicious results

Yaroslav Halchenko debian at onerussian.com
Wed Mar 2 15:39:41 UTC 2011


cool.

sorry about that -- we are thinking on the appropriate "global"
resolution... probably nuking header completely, besides
qform/sform information is the way to go....

for now, just set scl_slope to 1 and scl_inter to 0 in the
dataset.niftihdr prior map2nifti call

dataset.niftihdr['scl_slope'] = 1.
dataset.niftihdr['scl_inter'] = 0.

and then proceed with map2nifti

On Wed, 02 Mar 2011, Nynke van der Laan wrote:

> Dear Yaroslav,
> you are right: both have value 1,2222 as scl_slope!!
> How can I prevent this bias caused by the Map2Nifti? Is it possible to
> change the value to 1 in the Map2Nifti in order to copy the exact
> results from the sl_map to the resulting nifti??
> Best, Nynke

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