Hi Linda

it should be easy enough to make a scalar map and save it from matlab using save_mgh or MRIwrite.m. If it's first dimension has nvertices then tksurfer will know it's a surface overlay and not a volume.

cheers, Bruce On Wed, 21 Mar 2012, Linda Douw wrote:

Hi freesurfers,

Is it possible to make an overlay to load into tksurfer containing any type of data (for instance, centrality measures computed with graph theory) for a particular annotation? In the mailing archive, I've found tips about creating a custom LUT table and making it a segmentation, but you need the coordinates of the labels for that. In my case, I've made my own parcellation by using mris_divide_parcellation, so then I would have to know where to find the coordinates (I don't). And do you think this is the most efficient method?

Thanks!