[pymvpa] Memory requirements for PyMVPA?

[Kemal]

Two questions:

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
says I am running out of memory, and running top seems to confirm
this. This happens on a machine with 4GB of RAM, with almost no other
processes running. Does PyMVPA usually require much more RAM than
this? What about when I try to analyze larger datasets?

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.

Many thanks,
Kemal