Xue,
> I am using SnPM and I have a quick question with SnPMt.mat
> file. According to the comment, SnPMt.mat contains a 1xS matrix of
> the statistic of interest (either t or pseudo-t) supplied for all S
> voxels at locations XYZ. I assume this the statistic for the correct
> permutation. The matrix size for the file is 1 x 1923595. This does
> not conform to my image matrix size (199x199x199=7880599) I fed into
> the program. Does the SPM program chop off some of the peripheral
> regions? How could I translate the result back into my original
> image matrix? Thanks a lot for your time and help!
S is the number of voxels within the brain mask, which will generally
be quite smaller than the total number of possible voxels in the 3D
volume.
To work with SnPMt use the XYZ variable. XYZ is a 3xS matrix, giving
you the x,y,z location of each column of SnPMt.
Hope this helps! Happy hacking!
-Tom
-- Thomas Nichols -------------------- Department of Biostatistics
http://www.sph.umich.edu/~nichols University of Michigan
[log in to unmask] 1420 Washington Heights
-------------------------------------- Ann Arbor, MI 48109-2029
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