Dear Freesurfers,
I've generated individual polar, eccentricity, and fieldsign maps for each of my subjects. I would like to generate group average maps of these that I can visualize on the fsaverage brain.

When I ran:
isxconcat-sess -sf sessid -analysis rtopy.self.lh -o group_lh

I got:
ERROR: analysis space is self surface, not supported

How do I do a group average for the 3 different maps?

Thanks.
Michelle

For each person I ran recon-all and flattened occipital patches.
Then:
mkanalysis-sess -a rtopy.self.lh -surface self lh -TR 2 -retinotopy 48 -paradigm rtopy.par -nskip 4 -fwhm 0 -fsd bold -force
 mkanalysis-sess -a rtopy.self.rh -surface self rh -TR 2 -retinotopy 48 -paradigm rtopy.par -nskip 4 -fwhm 0 -fsd bold -force

preproc-sess -surface self lhrh -fwhm 5 -per-run -s sjXX -fsd bold -force

selxavg3-sess -a rtopy.self.lh -s sjXX -force
selxavg3-sess -a rtopy.self.rh -s sjXX -force

fieldsign-sess -a rtopy.self.lh -occip -fwhm 20 -s sjXX
fieldsign-sess -a rtopy.self.rh -occip -fwhm 20 -s sjXX