Dear Zohar,
One might wonder why your third group was not included in your
comparison but, anyway, spm_summarise is probably the function you are
looking for:
spm_summarise(spm_select(Inf,'image'),'cluster.nii',@mean)
Best regards,
Guillaume.
On 14/12/16 12:28, Zohar Berman wrote:
> Dear SPM users,
>
> I used VBM to compare grey matter density between two groups, and got 3
> significant clusters. I am interested in comparing the mean values in
> the identified clusters in these groups (which I already have) to the
> mean values of these clusters in a third group.
> Can someone recommend a way of extracting values for the third group?
> I have the clusters saved as masks but not sure regarding the next step.
>
> Any help would be much appreciated!
>
> thank you,
> Z
>
>
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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