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  

|
March 19, 2008 01:06PM
That is a very non-trivial question -- essentially, it is the 'model order selection' problem. There has been a lot of work on this over the last 30+ years in statistics, with no universally accepted conclusion.

You might restrict yourself to (say) a 3 second resolution in the hemodynamic response, so if your total response duration is expected to be 15 s, use 5 sin functions. But this is just a guess.
Subject Author Posted

sine basis functions

Chuck March 19, 2008 11:00AM

Re: sine basis functions

bob cox March 19, 2008 01:06PM