AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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August 19, 2014 09:48PM
Hi Aral,

The average correlation across the brain could
be done basically the way afni_proc.py computes
the single-value global correlation (GCOR). If the
data is scaled to be unit vectors (sum squares = 1),
then correlations are dot products. And the average
dot product of one vector with many others is the
dot product of it with the average. So...

3dTnorm -prefix unit.data DATA+tlrc
3dmaskave -quiet -mask BRAIN_MASK+tlrc unit.data+tlrc > brain.mean.1D
3dTcorr1D -prefix mean.brain.corr unit.data+tlrc brain.mean.1D

- rick



Edited 1 time(s). Last edit at 08/20/2014 12:44PM by rick reynolds.
Subject Author Posted

Global connectivity with instacorr

aral.ahmadi August 19, 2014 11:45AM

Re: Global connectivity with instacorr

rick reynolds August 19, 2014 12:14PM

Re: Global connectivity with instacorr

aral.ahmadi August 19, 2014 01:59PM

Re: Global connectivity with instacorr

rick reynolds August 19, 2014 09:48PM

Re: Global connectivity with instacorr

rick reynolds August 20, 2014 12:46PM

Re: Global connectivity with instacorr

aral.ahmadi August 25, 2014 10:30AM

Re: Global connectivity with instacorr

rick reynolds August 25, 2014 11:37AM

Re: Global connectivity with instacorr

aral.ahmadi August 25, 2014 12:17PM

Re: Global connectivity with instacorr

rick reynolds August 25, 2014 12:42PM

Re: Global connectivity with instacorr

aral.ahmadi August 25, 2014 01:17PM

Re: Global connectivity with instacorr

aral.ahmadi August 25, 2014 04:24PM

Re: Global connectivity with instacorr

rick reynolds August 25, 2014 04:42PM

Re: Global connectivity with instacorr

aral.ahmadi August 25, 2014 04:56PM

Re: Global connectivity with instacorr

aral.ahmadi August 28, 2014 10:31AM

Re: Global connectivity with instacorr

aral.ahmadi August 28, 2014 11:37AM

Re: Global connectivity with instacorr

rick reynolds August 29, 2014 10:18AM