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  

Previous Message Next Message
Message List New Topic Print View
|
Amy Frithsen
May 19, 2016 11:05PM
Hi AFNI folks,

I'm trying to run 3dDeconvolve using the motion parameters (from align_epi_anat.py) and their derivatives as regressors. First I detrended the motion parameters and then got their derivatives using 1d_tool.py. When I pass these on as regressors in 3dDeconvolve, I get warnings that my regressors are (nearly?) collinear. This makes sense since they are simply derivatives of one another. But how do I get around this? I know I can force it to work with a -GOFORIT flag, but this doesn't seem right. Is there a way to orthogonalize them first?

thanks
Reply Quote
RSS
Subject Author Posted

3dDeconvolve with motion and motion derivatives

Amy Frithsen May 19, 2016 11:05PM

Re: 3dDeconvolve with motion and motion derivatives

Bob Cox May 20, 2016 09:58AM

Re: 3dDeconvolve with motion and motion derivatives

Amy Frithsen May 20, 2016 06:16PM