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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shanusmagnus
July 22, 2014 10:45PM
Howdy -

I'd like to do a t-test on a contrast that I didn't completely specify in the 3dDeconvolves. Specifically, I have GLTs for conditions HSS, LSS, and NOV. I'd like to test (.5*HSS + .5*LSS) vs. NOV. I had the foresight to do some linear combination contrasts of this type in 3dDeconvolve, but sadly my prescience was not total.

I'd like to test this contrast without having to re-process all the data, so I tried to do the magic in 3dttest++, like so (cruft removed and abbreviated for clarity): 
3dttest++ -prefix "${STATS_DIR}/$outFile"
-paired   
-AMinusB	
-setA setA 
01 ".5*$data_dir/stats.tp101.amblock.averaged+tlrc.HEAD[${contrast1a}#0_Coef] + .5*$data_dir/stats.tp101.amblock.averaged+tlrc.HEAD[${contrast1b}#0_Coef]"	
...
-setB setB 
01 "$data_dir/stats.tp101.amblock.averaged+tlrc.HEAD[${contrast2}#0_Coef]"
but no go. Is there an easy way to do this, or do I have to re-run all the 3dDeconvolves again to create GLTs for .5*HSS + .5*LSS, and all similar things?
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Subject Author Posted

3dttest++ with linear combination of bricks?

shanusmagnus July 22, 2014 10:45PM

Re: 3dttest++ with linear combination of bricks?

rick reynolds July 23, 2014 08:04AM

Re: 3dttest++ with linear combination of bricks?

gang July 23, 2014 09:51AM

Re: 3dttest++ with linear combination of bricks?

shanusmagnus July 23, 2014 04:15PM