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  

|
August 16, 2009 12:03PM
Hi Tali,

For events longer than 1 or 2 seconds, the BLOCK basis function
is recommended (assuming you want a simple fixed shape response).

We don't have a great method for looking at basis functions, but
consider this for example, to generate the X-matrix for a 5 sec
stimulus (with unit response height):

3dDeconvolve -nodata 20 1 -polort -1 -num_stimts 1 \
-stim_times 1 '1D: 0' 'BLOCK(5,1)' -x1D X.xmat.1D -x1D_stop

1dplot X.xmat.1D

Note that this generates 20 1-second TRs, without any baseline.
Change the 5 to be whatever duration you want to review.

- rick

Subject Author Posted

3dDeconvolve problem

Tali August 14, 2009 01:59PM

Re: 3dDeconvolve problem

Aisling Whitaker August 14, 2009 02:11PM

Re: 3dDeconvolve problem

Tali August 15, 2009 05:17PM

Re: 3dDeconvolve problem

rick reynolds August 16, 2009 12:03PM

Re: 3dDeconvolve problem

Tali August 17, 2009 05:06PM

Re: 3dDeconvolve problem

rick reynolds August 17, 2009 05:52PM

Re: 3dDeconvolve problem

Tali August 17, 2009 07:31PM

Re: 3dDeconvolve problem

rick reynolds August 17, 2009 08:03PM

Re: 3dDeconvolve problem

Tali August 21, 2009 10:22AM