Dear freesurfers,
I am trying to see what are the group differences in cortical thickness of patients with right and left FLE compared to controls using the GLM.
I created a txt file in gedit called my_age_fsgd.txt (please see the attachment) containing my subjects (patients and controls) and their age. I am not interested in doing a study versus gender just versus age.
Following the instructions from the tutorial I was running the mri_preproc: mris_preproc --fsgd my_age_fsgd.txt \ --target fsaverage \ --hemi lh \ --meas thickness \ --out lh.gender_age.thickness.mgh
but I got an error: ERROR: no subjects specified. Also, what should be my contrast vector if I am not interested in considering the gender. I found in one tutorial that I should create age.mat if it does not exist and it should contain this line: 0 0 1
Why this numbers?
Can anyone give a hint please in how to eliminate my error and how to create the contrast vector in order to take in consideration only my subject's age?
Many thanks, Antonella