hi, i'm trying to map the functional data from each of my subjects into a common space on the surface. i have moved my volume functionals into icosahedron space for two subjects and then converted to a .asc text file but the text files show that the two datasets have a different number of nodes (163519 and 163798). i did the same thing without the icosahedron as a trgsubject on vol2surf (presumably in sphere.reg space, then) and also got different numbers for different subjects. is there a way to map the functional data from different subjects on to the same number of nodes (ie. a common space)? and if so, would a particular node on one subject correspond to the same place on another subject?
mri_vol2surf --src 003/bold/03.trim_action.100.intval.resam+orig.BRIK --src_type afni --srcreg 003/bold/register.dat --hemi rh --projfrac-avg 0 1 10 --trgsubject ico --icoorder 7 --out 003/surf/trim_action.100.intval.ico7.preconvert -out_type paint
mris_convert trim_action.100.intval.ico7.preconvert.w trim_action.100.intval.ico7.asc s003:163519 nodes
mri_vol2surf --src 002/bold/02.action.intval.resam+orig.BRIK --src_type afni --srcreg 002/bold/register.dat --hemi rh --projfrac-avg 0 1 10 --trgsubject ico --icoorder 7 --out 002/surf/02.action.intval.ico7 -out_type paint mris_convert 02.action.intval.ico7.w 02.action.intval.ico7.asc s002:163798
thanks, emily