Dear Freesurfer experts


I have a question about weighting different contrasts using mkcontrast-sess 
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 


Zahra (Mona) Nasiriavanaki

Postdoctoral Research Fellow

Martinos Center for Biomedical Imaging

Massachusetts General Hospital

149 13th Street, 149-2615

Charlestown, MA, USA, 02129

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