[pymvpa] Searchlight radius questions

[Ping-Hui Chiu]

Dear PyMVPA experts,

r=0, 1, 3 respectively correspond to 1, 9, 123 voxels in the following page:

http://dev.pymvpa.org/examples/searchlight.html

However, doesn't r=1 encompass 1 center+6 faces=7 voxels?
Also, is there a formula for calculating the number of voxels given a
specific radius?
Finally, suppose a voxel=3*3*3mm, is it correct that r=3 covers up a
neighborhood of (left 3*3mm + center 1*3mm + right 3*3mm)=21mm spherically?

Thanks!
Dale
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/pkg-exppsy-pymvpa/attachments/20120909/aab0ec88/attachment.html>