you can easily combine them as the label files have the number of vertices in each cortex, so generating a weighted average (which will be pretty close to equal weighting) should be straightforward.
cheers, Bruce
p.s. one of the first lines of the label files tells you how many vertices are in the label
On Wed, 19 Dec 2007, Wang, Xin wrote:
Thank you very much very for your quickly reply, Dr. Fischl.
The commend you suggested only calculates the average for each hemisphere, but we need the average across both hemispheres (i.e., whole brain). Could you suggest how to do it without noncortical regions?
Thank you,
Xin
From: Bruce Fischl [mailto:fischl@nmr.mgh.harvard.edu] Sent: Wed 12/19/2007 10:26 AM To: Wang, Xin Cc: freesurfer Subject: Re: [Freesurfer] the unknown zone in the average
Hi Xin,
you can use mris_anatomical_stats with -l ?h.cortex.label, which should be generated automatically, to avoid noncortical regions.
cheers, Bruce On Wed, 19 Dec 2007, Wang, Xin wrote:
Hello, Group,
We calculate the globe mean of thickness by using mris_convert -c lh.thickness lh.white lh.thickness.asc mris_convert -c rh.thickness rh.white rh.thickness.asc and then merge two .asc files to calculate the average
Does this procedure include the neocortex only, or also include some spots in the unknown zone that also have readings in the thickness map?
If the unknown zones are included how to exclude them?
we processed the data with the version prior to 4.0.1.
Thank you in advance,
XIn Wang