Cameron Ellis wrote:

Hi all, Is it necessary to include a value in your contrast matrix for every class and variable in your fsgd file?

Yes, you have to have a value in the contrast matrix for each regressor in the design matrix.

It seems that this is the case. My understanding is that if you weight a variable 0 then it is automatically controlled for. So if am required to weight a variabe in the contrast matrix that do not want to control for, then to not control for it I have to make a different fsgd file without that variable?

Yes, if you do not want to control for a variable then leave it out of the analysis entirely.

doug

Thanks, Cameron _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer