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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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Hi Gang,
Getting back to this thread after some time away. I'd like to take a fresh shot at using 3dLME with a structural analysis. I have two groups of subjects with up to 4 timepoints per subject. However, some subjects have as little as one timepoint.
Instead of including a variable that notes the duration between scans (which would cause missing data for subjects with only one sca
by
lfolandross
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AFNI Message Board
I see. This may be a silly follow-up question, but for participants with only a single timepoint, would it be acceptable to enter a single uniform value (e.g., 0 or 999) for the "interval" variable?
thanks,
Lara
by
lfolandross
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AFNI Message Board
Hi Gang,
Is there another way to construct the model so that all timepoints (including subjects with only 1 timepoint) can be used?
Thanks,
Lara
by
lfolandross
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AFNI Message Board
Hi Gang,
Thanks for your quick reply!
My setup is below. In addition to group, sex and scan site, I have baseline age (age at time 1), and interval (duration between time 1 and time 2) in my model. My specific question is for participants that only have 1 scan - would I leave "interval" blank?
On another note, I'd appreciate your feedback on whether what I have here is a
by
lfolandross
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AFNI Message Board
Hi Gang,
I have a study in which I'm comparing activation between patients and controls. Most participants have 2 timepoints, but not all. Is it possible to include all data (including single timepoints) in using 3dLME? If so, how would I model the time between visits?
thanks in advance,
Lara
by
lfolandross
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AFNI Message Board
Hi Rick,
Thanks for your reply. Removing the '\' characters from the dataTable file unfortunately didn't do the trick. Any other ideas?
Many thanks again,
Lara
by
lfolandross
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AFNI Message Board
Hello,
I've run into an error running 3dMVM and would very much appreciate some tips on how to troubleshoot.
Here's my input:
3dMVM -prefix Test -jobs 1 \
-bsVars "group*sex+age" \
-wsVars "emotion" \
-qVars "age" \
-num_glt 3 \
-gltLabel 1 grp_sad_v_neu -gltCode 1 "group : 1*CTL -1*MDD emotion : 1*sad -1*neutral" \
-gltLabel 2 grp
by
lfolandross
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AFNI Message Board