[pymvpa] SMLR weights

[Daqiang Sun]

Dear all,

I just started learning PyMVPA and ran some structural imaging data of patients and controls.
To get SMLR weights, I tried both SMLRWeights(SMLR()) and SMLR().getSensitivityAnalyzer(). Although they give the same selected voxels, but the values are different. Which one should I use?
I assumed that the dot product of weights and selected voxel values (gray matter density in my case) would give an idea about how the two groups could be separated, but it looks not the case. Although the prediction accuracy is pretty good (85%), the dot products for the two groups are largely overlapped. I guess I just misunderstood it. Could you give me some idea about what the weights are about? 

Thanks for providing such an excellent package!

Best regard, Frank