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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June 22, 2020 10:46AM
Hello,

Sorry for not getting to this.

Yes, polort regression is very similar to high-pass filtering, though it is a *little* different, since the regressors do not span the same space.

The reason going above polort 2 is not so useful is because a slow cubic is pretty well modeled by a sine function (plus a quadratic). The higher degree polorts are not so useful when a bunch of sinusoids are already in the model.

- rick
Subject Author Posted

polort and filtering

samw June 05, 2020 10:34AM

Re: polort and filtering

rick reynolds June 22, 2020 10:46AM