[pymvpa] Memory requirements for PyMVPA?

[Yaroslav Halchenko]

> 1. When I try to follow the tutorial
> (http://www.pymvpa.org/examples.html), I get an error right at the
> beginning, when reading in the sample dataset (bold.nii.gz). The error
which particular example runs out of memory?

we run daily tests on a box with 3GB -- never had a problem with
examples -- example dataset shipped within pymvpa is quite tiny

are you running example on full example dataset or just the small one
which is shipped within pymvpa?

> 2. If I ever manage to get the dataset imported, I'd like to run a PCA
> analysis, then write out the component voxels again to a NiFTI-1
> formatted file. I can't find any information on writing out data
> again, except as a Python object. Is this even possible? If not, I'd
> appreciate any nudges towards a solution.

look at map2Nifti -- it can digest a numpy array of proper
dimensionality (PCA components or projections, depending which way you
do it) should have a matching dimension

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