Dear Teresa,
you're looking at the right place (DCM.Y.y in DCM*.mat or xY.u in
VOI*.mat, see spm_regions.m/spm_dcm_specify.m).
The large values you observe at the beginning and end of the time series
are symptomatic of the fact that you didn't 'adjust' the data, see the
following previous threads:
https://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=SPM;53bec932.1004
https://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=SPM;12a3bf1.1003
https://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=SPM;7e07ce6a.1004
Best regards,
Guillaume.
Teresa Murta wrote:
> Hi,
> I’m trying to find, in the structures VOI … .mat or DCM … .mat, the representative time course of each VOI (the principal component). The variable DCM.Y.y seems to be related with the representative time course of the VOI but it has two values (the first and the last point) really bigger then the others and has a slow drift with two local maxima. Anybody know how can I know the representative time course of each VOI?
> Thanks,
> Teresa
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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