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
|
rick reynolds
February 21, 2019 10:03AM
Hi Dan,

1) The polort 0 terms that I mentioned are the beta weights for the constant terms in the linear regression. You are probably not even getting them as output (by default, they are not output). Given that, it might be more simple to just say that 'basic' and 'demean' should produce identical results.


2) Using 'demean deriv' will certainly differ. That includes the 6 extra regressors. You should expect that to be different from 'basic' or just 'demean'.


Look at the motion_demean.1D and motion_deriv.1D plots, e.g.

1dplot -sepscl motion_demean.1D &
1dplot -sepscl motion_deriv.1D &

Using "-regress_apply_mot_types demean" will include that first set of 6 time series in the regression. Including 'deriv' means including the second set of 6 as additional regressors. That will change the result.

- rick
Reply Quote
RSS
Subject Author Posted

the problem about“cnesor”and “regress_apply_mot_types”in afni_proc.py

Dan February 19, 2019 01:46AM

Re: the problem about“cnesor”and “regress_apply_mot_types”in afni_proc.py

rick reynolds February 19, 2019 09:36AM

Re: the problem about“cnesor”and “regress_apply_mot_types”in afni_proc.py Attachments

Dan February 19, 2019 10:32PM

Re: the problem about“cnesor”and “regress_apply_mot_types”in afni_proc.py

rick reynolds February 21, 2019 10:03AM

Re: the problem about“cnesor”and “regress_apply_mot_types”in afni_proc.py

Dan February 22, 2019 09:16AM