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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Catherine
May 04, 2006 02:14PM
Hi Gang
I am having another problem with 3dRegAna. At the moment I am trying to correlate a number of behavioural measures with brain activation in a clinical and a control group. So far, I have been succesful in carrying out correlations with percent correct responses and also, in the clinical group, with measures of symptom severity. However, when I try to correlate brain activation with correct response reaction time I am geeting the following error:
3dRegAna Error: Error in calculating F - lack of fit

I presume that this means that the model I am using is not suitable. My command is as follows:

3dRegAna \
-rows 12 \
-cols 1 \
-xydata 930 sm00066.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 821 sm0090.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 758 sm00101.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 1297 sm00167.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 918 sm00178.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 1048 sm00325.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 971 sm00764.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 657 sm00775.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 896 sm00830.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 841 sm00863.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 975 sm00874.ThreeRuns.dec.VSAT+tlrc.HEAD \
-xydata 1743 sm6406.ThreeRuns.dec.VSAT+tlrc.HEAD \
-fdisp 10 \
-model 1 : 0 \
-flof 0.01 \
-fcoef 0 CorrRT.CON.constant \
-fcoef 1 CorrRT.CON.linear \
-bucket 0 CorrRT.VSAT.CON.corr

Should I change my model and if so to what?

Thanks in advance for your help!
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Subject Author Posted

3dRegAna

Catherine May 04, 2006 02:14PM

Re: 3dRegAna

Gang Chen May 04, 2006 03:24PM

Re: 3dRegAna

Catherine May 04, 2006 04:44PM

Re: 3dRegAna

Gang Chen May 04, 2006 05:17PM

Re: 3dRegAna

Catherine May 05, 2006 11:19AM