Hello,
I'm trying to use the mri_glmfit function but keep running into the same error.
I am using the FSGD format and have set up my fsgd file according to the tutorial instructions:
" GroupDescriptorFile 1 Title mci_age_BNTchange Class Male Class Female Variables Age BNTchange Input Subject1 Male 70 2 Input Subject2 Female 75 -3 Input Subject3 Female 72 0 etc."
Our .mat file states:
" 0 0 0 1" indicating that "BNTchange" is our variable of interest.
We are attempting to run a DOSS analysis.
The line of code I type into the terminal is:
" mri_glmfit --glmdir mci_age_bntchange_lh --y dv-visit2-lh.mgz --fgd mci_age_bntchange.fsgd doss --C mci_age_bntchange.mat"
This results in the following error:
"ERROR: matrix is illconditioned or badly scaled, condno = 1e+08"
We have tried runninf this off of different versions of Freesurfer (R302 and R305) and cannot figure out how to fix this error.
Any help would be appreciated!
Thanks!
- Lusineh Gharapetian