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[Freesurfer] GLM: what does "mris_preproc" do?

Hello Freesurfers, I understand that the output of "mris_preproc" can be the input of "mris_glmfit". In mris_glmfit, a GLM is performed. Does "mris_preproc" give you a smoothed average of all the subjects? If that's the case, how can you perform a GLM with just the average? Don't you need the dat

Re: [Freesurfer] GLM: what does "mris_preproc" do?

Hi Ye, have you looked at the mris_preproc help? You can access it with mris_preproc --help. Let me know if that does not answer your questions doug On 4/6/14 6:09 PM, ye tian wrote: Hello Freesurfers, I understand that the output of "mris_preproc" can be the input of "mris_glmfit". In mri

Re: [Freesurfer] GLM: what does "mris_preproc" do?

Dear Doug, Thank you, but I am only more confused after reading the summary. The summary basically reaffirms my understanding that "mris_preproc" gives "an average subject". How can this be an appropriate "data" for GLM, which for sure needs multiple data points? Thank you! Sincerely, Ye On Su

Re: [Freesurfer] GLM: what does "mris_preproc" do?

It resamples them to a common space (the "average" subject) but does not average them together. The result is a "stack" which is a single file with multiple subject it in it ready for GLM analysis doug On 4/6/14 6:18 PM, ye tian wrote: Dear Doug, Thank you, but I am only more confused after

Re: [Freesurfer] GLM: what does "mris_preproc" do?

Dear Doug, Thank you very much! Sincerely, Ye On Sun, Apr 6, 2014 at 5:32 PM, Douglas Greve wrote: > It resamples them to a common space (the "average" subject) but does not > average them together. The result is a "stack" which is a single file with > multiple subject it in it ready for GLM

Re: [Freesurfer] mri_vol2surf --projopt

Unfortunately that is no option for me. On Fri, 04 Apr 2014 15:33:47 -0400 Douglas N Greve wrote: > > Don't use --projopt and it won't segfault > > On 04/03/2014 02:08 AM, Joerg Pfannmoeller wrote: > > The command is: > > > > mri_vol2surf --mov /.../f001.nii --reg /.../register.f1.dof6.dat