It is the error in the model fit. If you run mri_glmfit with --save-eres it will save a file called eres.mgh. this is the residual file

On 6/3/16 6:29 PM, Chung, Yoonho wrote:

Dear freesurfer experts,

This is a follow up question from a previous post

http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg47480.html

I have created a sig.mgh from my own stats code and need to also generate fwhm.dat file to run the monte carlo sim, which is estimated from the residuals.

What are the specifics and dimension of this residual file I need to generate for mris_fwhm?

Is this a residual of model fit at each vertexacross all subjects (so [number of subjects x number of verticies] matrix in .mgh file)? or variance or standard deviation of the residuals?

Perhaps pointing to an example file in the glmdir directory (created when running glmfit) will help me understand the process (for example is rstd.mgh or rvar.mgh is being used for mris_fwhm --i or something else?).

Thank you for your help!

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