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
September 03, 2019 12:58PM
Hi Sally,

So you expect a quadratic fluctuation of the betas corresponding to some external behavioral parameter? If that is true, this might be more easily solved using amplitude modulation in 3dDeconvolve/3dREMLfit. You could add linear and quadratic modulators (using Legendre polynomials) to the stimulus times, and the result would be 3 betas, for the mean, linear and quadratic magnitudes. That would be more straightforward than trying to implement something in 3dNLfim.

Does that seem like a reasonable option?

- rick
Reply Quote
RSS
Subject Author Posted

Nonlinear fitting using 3dNLfim?

zjjdcrn August 20, 2019 11:59AM

Re: Nonlinear fitting using 3dNLfim?

rick reynolds August 22, 2019 12:27PM

Re: Nonlinear fitting using 3dNLfim?

zjjdcrn August 26, 2019 10:58AM

Re: Nonlinear fitting using 3dNLfim?

zjjdcrn August 30, 2019 01:02PM

Re: Nonlinear fitting using 3dNLfim?

rick reynolds September 03, 2019 12:58PM

Re: Nonlinear fitting using 3dNLfim?

zjjdcrn September 11, 2019 03:47PM