Hi Valeria,
> I have a problem in processing my fMRI data:
> I'm trying to extract the signal change from an activated cluster (in a one sample t-test) localized in amygdala. Extracting the signal change using Marsbar I obtain, in the matlab window, the information "empty matrix".
> Could someone help me, please?
Could I suggest you send this kind of query to the MarsBaR mailing list?
https://lists.sourceforge.net/lists/listinfo/marsbar-users
It's difficult to know exactly what the problem is, but you should check the
position of the ROI on one of the analysed images to make sure it is properly
registered (Select EPI image using Options-Edit-default structural, then view
the ROI with ROI definition-View),
Best,
Matthew
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