Thanks a lot Doug! It was exactly what I needed.

Mona

Zahra (Mona) Nasiriavanaki

Postdoctoral Research Fellow

Martinos Center for Biomedical Imaging

Massachusetts General Hospital

149 13th Street, 149-2615

Charlestown, MA, USA, 02129

________________________________ From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Greve, Douglas N.,Ph.D. DGREVE@mgh.harvard.edu Sent: Monday, September 16, 2019 10:13 PM To: freesurfer@nmr.mgh.harvard.edu freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] mkcontrast-sess question

Are you trying to do a parametric analysis? See https://surfer.nmr.mgh.harvard.edu/fswiki/FsFastParametricModulation

On 9/13/19 11:08 AM, Nasiriavanaki, Zahra wrote: Dear Freesurfer experts

Hi

I have a question about weighting different contrasts using mkcontrast-sess commmand. I have single subject functional data with 18 different contrasts, and I am willing to weight the different contrasts as (for example) ascending linear. Something like: mkcontrast-sess -an $analysis -a 1 -a 2 -a 3 -a 4 -a 10 -a 11 -a 12 -a 13 -a 6 -a 7 -a 8 -a 9 -a 15 -a 16 -a 17 -a 18 In which contrast number two weights twice as contrast number one and contrast number 3 weights twice as contrast number 2 and so on. Is there any way I can do such a thing with mkcontrast-sess? or do you have any suggestion for such an analysis?

Thanks Mona

Zahra (Mona) Nasiriavanaki

Postdoctoral Research Fellow

Martinos Center for Biomedical Imaging

Massachusetts General Hospital

149 13th Street, 149-2615

Charlestown, MA, USA, 02129

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