[pymvpa] NiftiDataset mask: is it OK to use not discrete binary mask?

[Vadim Axel]

Hi,

My mask is based on exported SPM contrast definition, so instead of 0 and 1,
it contains 0 values for exclude and range of values 0<value<1 for include.I
expect that all non-zero voxels to be included. Indeed, based on number of
selected features in my dataset I get what I expect. I just wanted to make
sure that this is by design and I wasn't just lucky.

Thanks,
Vadim
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