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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Gang Chen
April 28, 2004 02:00PM
Giovanni,

In your case the stimuli are not TR-synchronized. If you trust some standardized function as your impulse response function (i.e., gamma variate), you can run waver with its -tstim option to generate regressors for -stim_file option in 3dDeconvovle. The input file for waver in this case has to be in real time, not coded in 0's and 1's.

If you are interested in generating your own impulse response function, you can do so with a slightly complicated procedure. The basic idea is that you can model the impulse response function with a set of basis functions (such as tent function) in waver, and then run regression on the convolved basis functions. Refer to the classnote at [afni.nimh.nih.gov] for more details.

Gang
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3Ddeconvolve, stim_file problem

Giovanni April 28, 2004 12:30PM

Re: 3Ddeconvolve, stim_file problem

Gang Chen April 28, 2004 02:00PM