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

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qiuhai
January 15, 2019 05:16PM
Hi Rick,

I have a question regarding the values in motion_deriv.1D file (generated by afni_proc.py, or actually by 1d_tool.py with -derivative option). When I look at the enorm values (from motion_sub01_enorm.1D), it makes sense to me that the first value of each run is 0, since the derivatives of each run are specified to 0. However, in motion_deriv.1D, there are small numbers for the first volume (TR) of each run. And it seems that all derivatives for following TRs in that run are adjusted by these small numbers of the first TR, as compared to the situation of specifying derivatives for the first TR to 0. Where do these numbers come from? and why? e.g., for use in regression? Thanks!

Qiuhai
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Subject Author Posted

Creating censor file for 3dDeconvolve

Dan October 06, 2018 12:21PM

Re: Creating censor file for 3dDeconvolve

rick reynolds October 11, 2018 09:26AM

Re: Creating censor file for 3dDeconvolve

qiuhai January 15, 2019 05:16PM

Re: Creating censor file for 3dDeconvolve

rick reynolds January 16, 2019 09:30AM

Re: Creating censor file for 3dDeconvolve

qiuhai January 19, 2019 12:49AM

Re: Creating censor file for 3dDeconvolve

qiuhai January 22, 2019 06:31PM