More covariates follows the same pattern as having one or two coviariates

Dear experts,

I am trying to perform mri_glmfit to generate images indicating cortical thickness differences between groups. My data has 6 or 7 covariates such age, sex, smoking, hypertension, diabetes etc.

 

I wonder how to make contrasts.mat files.Those are supposed to be a lot of files. 

FSTutorial shows only the example of two covariates. 

 

Thank you.

Sincerely,

Kyung

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