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Dear FreeSurfer Experts,
I have been having trouble with performing DOSS analyses with mri_glmfit. One of the groups in my sample is too small to be performed with DODS, but when I try to call the DOSS option in mri_glmfit, it returns the same error, saying that DODS is not possible with this sample. I even tried defining the design matrix manually using --X, but it returns the same error.
mri_glmfit --glmdir lh.rate.CI.paired-diff.thickness.DOSS --y mgh/rates/lh.thickness-rate.stack.fwhm10.mgh --fsgd FSGD/CI_baselines/paired-diff-demean-CI.fsgd doss --surf fsaverage lh --C Contrasts/BMICorrelationCI_DOSS.mtx gdfRead(): reading FSGD/CI_baselines/paired-diff-demean-CI.fsgd INFO: DeMeanFlag keyword not found, DeMeaning will NOT be done. Continuous Variable Means (all subjects) 0 BMIatBaseline -1.49788e-08 3.57667 1 AgeAtFirstTP -5.62933e-08 3.40434 Class Size and Means of each Continuous Variable 1 MaleNormal 26 -0.5852 0.2393 2 MaleCI 2 0.8115 2.2778 3 FemaleNormal 38 0.2564 -0.2749 4 FemaleCI 6 0.6414 -0.0556 ERROR: Class MaleCI has 2 members. With 2 variables and using DODS, you need at least 3 members
If anyone has any ideas on how to go about this, that would be greatly appreciated.
Thank you. William