Re: [Freesurfer] mri_glmfit error: negative DOF -10

2013-09-18 Thread Douglas Greve
It usually means that the number of subjects in the input is less (10 less) than the number of regressors. It looks like you have about 14 input subjects and 24=6*4 regressors. You need to add subjects or remove regressors (ie, classes or covariates) doug On 9/18/13 11:41 AM, Robert Schulz wro

[Freesurfer] mri_glmfit error: negative DOF -10

2013-09-18 Thread Robert Schulz
Hello, I am using mri_glmfit to perform a correlation analysis between some surface-based DTI measures and a behavioural outcome (grip), aiming to correct for scannertyp (C,I,W), handedness (R,L) as discrete variables and age (AGE) and duration (Mo) as continuous covariates. Please find the fsg