Hi Bram, there is not a way to do it with a single command. You could use the aparc+aseg, merge the two hemi labels into one, then run mri_segstats. If you want to stick with pure surface-based analysis, then you'd have to  run mri_segstats twice, then just compute a weighted mean of the two waveforms (weighted by the number of vertices in each)
doug


On 1/16/2023 4:30 PM, Bram Diamond wrote:

        External Email - Use Caution        

Hello FreeSurfer Team,

I've made a New Year's resolution to stop bothering Andrew Hoopes and instead send my questions to the FreeSurfer Mailing List.

I would like to calculate a single average waveform for two surface labels on contralateral hemispheres. In essence, I would like to treat these contralateral labels as a single label.

Is there a way to use freesurfer binaries (e.g., mri_segstats) with, lh.func.mgz, rh.fun.mgz, lh.ROI.label, and rh.ROI.label to write a text file with a single average waveform column?

Thanks! I hope all is well in Boston!

Cheers,
Bram

Bram R. Diamond, BSc
Clinical Neuropsychology Doctoral Student
Northwestern University Feinberg School of Medicine
Mesulam Center for Cognitive Neurology & Alzheimer’s Disease
300 E. Superior Street | Tarry 8 | Chicago, IL 60611

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer