Hi, 

I have a label with vertex index, RAS and overlay values, and want to add spherical coordinates to them as presented in tksurfer. 

I found following archives that are related to this question, but I couldn't find any vertex index (number) information in a sphere.reg file. 

(http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg00627.html)

I converted ?h.sphere.reg file into ?h.sphere.reg.asc using mris_convert command, and imported it to MATLAB using read_asc.m file (without face data). 

They had [x,y,z] coordinates in columns, but did not provide vertex index information. 

I wonder if there is a way to read the vertex index from a sphere.reg file, 

or there are other methods that read both vertex index and spherical coordinates. 

Thank you,

Jihoon Oh

-- 
Jihoon Oh, M.D. 

Korea Advanced Institute for Science and Technology (KAIST)