Xue,
>> I posted a previous question regarding the memory problem I encountered
>> while using SnPM. The problem was solved by choosing the slice by slice
>> calculating mode. However, there is no similar option if you want to do
>> the variance smoothing (pseudo-t).
Did you try using in-plane-only variance smoothing? Like a variance
smoothing of [10 10 0] ? That will allow you to work slice-by-slice
("non-volumetrically") and get pseudo-t's.
-Tom
PS:
If you specify in-plane-only variance smoothing and don't get asked
whether you want to "Work volumetrically?", then you have to edit
snpm_ui.m; find the line
nMax4DefVol=16; % Default to volumetric if less than nMax4DefVol scans
and change 16 to something smaller than your number of scans (e.g. 0).
Then when you run 'Configure', specify in-plane-only variance
smoothing and then you should be asked the question
13 scans: Work volumetrically?
-- 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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