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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May 18, 2012 02:12PM
> I use the default operation, -center DIFF. I did not demean the covariates. Is it correct?

Since you have one group of subjects, that should be fine.

> There is not sub-brick that is correlation coefficient between image and blood-test after remove the age effect, right?

You already have the regression coefficient for blood test, right? The correlation coefficient between z-score and blood test is just a special coefficient when both z-scores and blood test values are standardized. And the t-statistic would be the same between the correlation coefficient and the regression coefficient. If you're desperately need the correlation coefficient, you can get it through standardizing those variables.

Gang
Subject Author Posted

request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 14, 2012 04:36AM

Re: request for calculating voxelwise correlation coefficient help

Daniel Glen May 14, 2012 10:59AM

Re: request for calculating voxelwise correlation coefficient help

Gang Chen May 14, 2012 11:24AM

Re: request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 14, 2012 02:35PM

Re: request for calculating voxelwise correlation coefficient help

Gang Chen May 14, 2012 03:41PM

Re: request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 15, 2012 02:12PM

Re: request for calculating voxelwise correlation coefficient help

Gang Chen May 16, 2012 09:57AM

Re: request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 18, 2012 02:18AM

Re: request for calculating voxelwise correlation coefficient help

gang May 18, 2012 12:49PM

Re: request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 18, 2012 01:53PM

Re: request for calculating voxelwise correlation coefficient help

gang May 18, 2012 02:12PM

Re: request for calculating voxelwise correlation coefficient help

Xiaozhen Li May 18, 2012 02:59PM

Re: request for calculating voxelwise correlation coefficient help

moreau January 04, 2017 11:59AM

Re: request for calculating voxelwise correlation coefficient help

gang January 05, 2017 08:48AM