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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Jim Eliassen
April 30, 2003 12:06PM
Hi Cherie,

If you want to produce a .1D file with twice as many data points as your time series, you simply tell waver to use a TR (-dt I think is the flag) that is half the size of your actual TR, in your case TR=1.25 instead of TR=2.5sec.

The only AFNI program that I know of that can use .1D files that are twice as long as FMRI time series is 3dDeconvolve using the -stim_nptr flag. This option allows one to model a hemodynamic response at a higher frequency than the rate obtained in the data assuming you've designed your experiment to meet the criteria for using the -stim_nptr flag. You'd have to read up on the implementation of this to know if it will work for you.

-jim
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Subject Author Posted

subsampling in a time series

Cherie Marvel April 29, 2003 03:18PM

Re: subsampling in a time series

Lukas Pezawas April 29, 2003 03:36PM

Re: subsampling in a time series

bob cox April 29, 2003 07:48PM

Re: subsampling in a time series

Cherie Marvel April 30, 2003 11:24AM

Re: subsampling in a time series

bob cox April 30, 2003 11:58AM

Re: subsampling in a time series

Jim Eliassen April 30, 2003 12:06PM

Re: subsampling in a time series

Cherie Marvel April 30, 2003 12:37PM