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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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Thank you, Gang!
For the '[#ConditionOfInterest]', do I only need to enter the sub-brick number, or do I need to include the number and entire name?
Ex: '[#74 ant_target_bev_vs_neut#0_Tstat]'
At first, I used '' and received an error stating "bad sub-brick selector".
Lindsay
by
lindsayr
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AFNI Message Board
Hi Gang,
3dcalc script in nedit:
3dcalc -a stats.xxxxxxx_20140102.mid2_REML+tlrc -b stats.xxxxxxx_20140109.mid2_REML+tlrc \
-expr 'abs(a-b)' \
-prefix xxxxxxx_absMid2 \
3dinfo dset a:
Dataset File: stats.xxxxxxx_20140102.mid2_REML+tlrc
Identifier Code: XYZ_8Qx2jclxPKnwXccYteGr1w Creation Date: Wed Jan 28 15:40:25 2015
Template Space: TT_N27
Dataset Type: Func-
by
lindsayr
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AFNI Message Board
Hi Gang,
This is correct. I ran 3dREMLfit on all runs, and want to take the absolute value of dset a and dset b for each participant.
I ran the 3dcalc script you wrote for each pair of runs I need the absolute difference for, and this only was successful for 2 participants. For the other 6 participants, a 'fatal error' came up saying, "Multi-brick datasets don't matc
by
lindsayr
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AFNI Message Board
Thank you SO much for your lightening fast response, Gang!
You're correct that I want to do the group analysis, and the paired t-test would be perfect if I wasn't blind to the drug and placebo sessions. The issue is that instead of calculating sessionA-sessionB or sessionB-sessionA, I need to see the Abs(sessionA-sessionB). It's completely okay if we don't know the direc
by
lindsayr
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AFNI Message Board
Hello,
We are running a within-subjects, double-blind, 2 session (1 session drug, 1 session placebo) randomized fMRI study and cannot break the blind yet. However, we would like to see if there are any voxels that consistently produce levels of activation or deactivation that are significantly different from 0 difference in activation or deactivation across the 2 sessions (within-subject) and
by
lindsayr
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AFNI Message Board