Dear SPM users,
I have a problem with an error message I get when trying to extract a VOI.
First some backgroud:
I ran an ANOVA on some EEG data (source-localised) in which I am comparing
3 groups. For an F-contrast I entered:
1 -1 0; -1 1 0; 1 0 -1; -1 0 1; 0 1 -1; 0 -1 1
.. in order to put all my comparisons of interests into one contrast. This
worked fine. When I tried to extract data as a volume of interest, it came
up with the following error:
___________
??? Error using ==> mtimes
Inner matrix dimensions must agree.
Error in ==> spm_regions at 183
y = spm_filter(SPM.xX.K,SPM.xX.W*y);
??? Error using ==> [Y,xY] = spm_regions(xSPM,SPM,hReg)
Error using ==> mtimes
Inner matrix dimensions must agree.
??? Error while evaluating uicontrol Callback
____________
It's clear that the dimensions of the matrices 'y' and 'W' do not agree.
Does anybody know why this might be, and whether it has something
specifically to do with the way I constructed my ANOVA? Is there a better
way of running the contrast I'm interested in?
Many thanks for your kind help,
Chris
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