OCN = output cluster number. Each vertex gets a value, that value is the integer number of the cluster number the vertex belongs to (or 0 if it does not belong to a cluster). It is basically a segmentation. For visualization, the .annot file is probably better. You might not have seen anything because nothing may have survived correction or because the threshold was too high
doug

On 2/21/14 8:47 AM, Yang, Daniel wrote:

Dear FreeSurfers,

I obtained a file from cluster analysis, called "cache.th20.pos.sig.ocn.mgh"

Can you tell me what OCN stand for? And what is this file for? I tried to view it but was unable to see anything.

Best,

Daniel

--

Daniel (Yung-Jui) Yang, Ph.D.

Postdoctoral Researcher

Yale Child Study Center

New Haven, CT

Tel: (203) 737-5454

E-mail: yung-jui.yang@yale.edu
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer