Dear experts,
I am trying to estimate the DCM parameters and create the group GCM file for PEB, but I get the following error during estimation:
Failed 'DCM estimation'
Index exceeds matrix dimensions.
In file "/projects/pbic1036/spm12_new/spm_dcm_peb.m" (v7476), function "spm_dcm_peb" at line 193.
In file "/projects/pbic1036/spm12_new/spm_dcm_peb_fit.m" (v7267), function "spm_dcm_peb_fit" at line 139.
In file "/projects/pbic1036/spm12_new/config/spm_cfg_dcm_est.m" (v7479), function "spm_run_dcm_est" at line 368.
Line 193 of function "spm_dcm_peb" is:
PE = pE{i}(q);
in a section of the script called "deal with rank deficient priors"
Does anyone know how to fix this?
Few details on my DCM model: it's resting-state data so my DCM model only has a specified A matrix (not fully connected because we left out a couple of connections that do not make sense anatomically), with B being a 4x4 zero matrix (I have 4 regions) and C being a 4x1 zero matrix.
Thank you!
Best,
Sara
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