Hi!
I have 6 runs/subject, each of which shows 2 out of 3 conditions.
I was planning the analysis like this in Feat:
have 4 EVs (cond1, cond2, cond3, errors), and put in an empty (0 0 0)
three-column format file for whenever a condition does not exist in a given
run (or when there are no errors instead of the errors file).
This would then allow me to do a second-level session to put together all my
runs, so that all EVs and contrasts are identical across lower-level feat
directories, even if some are empty. (This was taken from the
...fsl/feat5/detail.html page, under EV's).
As expected, I got a rank deficiency warning, but on top of that, I got:
>>
An exception has been thrown
Runtime error:- detected by Newmat: matrix is singular
>>
which was then followed by failure to find a number of files in the stats
subdirectory of Feat, and everything went downhill from there.
Any ideas?
Thanks!
cherif
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