Hi Qianwen – You don’t have to do (1) and (2), trac-all –stat does that for you. For a description of the measures, see the tutorial:

http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/TraculaStatistics

and the course slides:

http://surfer.nmr.mgh.harvard.edu/pub/docs/tracula,fs.ppt

Best,

a.y

From: <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of 薛倩雯 <627611631@qq.com>
Reply-To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Date: Wednesday, September 12, 2018 at 1:13 AM
To: freesurfer <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] questions about trac-all -stat

External Email - Use Caution

Dear experts,

I have some questions about along-path analysis:

(1)how to determine the first position and last position of all subjects' pathway when converting all pathstats.byvoxel.txt files to a table for group analyses?

(2)how to complete correspondence of points between subjects?

(3)what is values in table for group analyses,diffusion measure of center or something else?

Thanks!

Qianwen