There are two things you can do here. One is to create your own design
matrix in a text file and pass it to mri_glmfit with the --X (instead of
using an fsgd file). If you want to stay with the fsgd, then you can
spec DODS (this will set up one regressor for MMSE instead of two).
doug
Martin Kavec wrote:
Hi,
I am trying to run a group analysis on cortical thickness between patients and
controls. In the qdec.dat I set a MMSE for all the controls 0.0. Now,
whenever I try to covariate thickness against age and MMSE, the qdec
complains that there is no spectrum in MMSE values. I tried to set MMSE for
one of controls to 0.1 and the analysis goes fine. After thinking for a
while, I started to wonder whether I shouldn't calculate thickness difference
first, but I am not finding the receipt on the web anymore.
Thanks in advance,
Martin
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