Dear AFNI experts,
I try to run 3dICC on ‘very preliminary data’ (so very small sample size).
I would like to quantify networks similarity across 3 subjects.
3dICC -prefix myICC -jobs 4 \
-mask mask.nii.gz \
-model '1+Network+(1|Subj)' \
-dataTable \
Subj Network InputFile \
s1 N1 thresh_zstat13.nii.gz \
s1 N2 thresh_zstat8.nii.gz \
s2 N1 thresh_zstat17.nii.gz \
s2 N2 thresh_zstat13.nii.gz \
s3 N1 thresh_zstat9.nii.gz \
s3 N2 thresh_zstat10.nii.gz
When I ran 3dICC, it failed:
++++++++++++++++++++++++++++++++++++++++++++++++++++
***** Summary information of data structure *****
3 subjects : s1 s2 s3
6 response values
2 levels for factor Network : N1 N2
Contingency tables of subject distributions among the categorical variables:
***** End of data structure information *****
++++++++++++++++++++++++++++++++++++++++++++++++++++
Reading input files now…
[…]
Range of input data: [-6.717, 14.814]
If the program hangs here for more than, for example, half an hour,
kill the process because the model specification or something else
is likely inappropriate.
[1] “Great, test run passed at voxel (21, 43, 23)!”
Error in asMethod(object) : not a positive definite matrix
Calls: nrow … asMethod → as → .class1 → as → asMethod → as → asMethod
Exécution arrêtée
Do you have any idea about why it failed?
Many thanks in advance.
Carole
