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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rick reynolds
October 19, 2016 08:19AM
Hi Dan,

Enorm is the Euclidean norm (sqrt(sum squares)) of the
backward difference of the motion parameters.

The backward difference at the first time point of each
run is always 0, and so then is the enorm.

To put it another way, at the beginning of a run, how
much motion was there between the current and previous
time point? Answer: we have no way to know.

For more details, see options -backward_diff, -collapse_cols
and -censor_motion in the output of 1d_tool.py -help.

- rick
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Subject Author Posted

1d_tool.py

CD-Dan October 19, 2016 12:51AM

Re: 1d_tool.py

rick reynolds October 19, 2016 08:19AM

Re: 1d_tool.py

CD-Dan October 22, 2016 03:34AM

Re: 1d_tool.py

rick reynolds October 25, 2016 06:56PM