Dear SPM experts,
Hi,
I am trying to estimate stochastic DCM for 8 VOIs (8 nodes) from task fMRI.
At first, I got a deterministic DCM (dDCM) for task fMRI (8 VOIs).
After the deterministic DCM, then I assigned the parameters of dDCM to DCM, 'DCM.options.P = dDCM.Ep;'
But I got an error message during 'sDCM = spm_dcm_estimate(DCM);' as following.
Error using eigs/processingEUPDinfo (line 1280)
Error with ARPACK routine dneupd:
dnaupd did not find any eugenvalues to sufficient accuracy.
Error in eigs (line 353)
flag = processEUPDinfo(nargout<3);
Error in spm_dx (line 104)
[V,D] = eigs(dfdx,1,'SR',OPT);
Error in spm_LAP (line 655)
dq = spm_dx(dfdq,spm_vec(f),1/nD);
Error in spm_dcm_estimate (line 327)
DEM = spm_LAP(DEM);
In debugging mode, I found 'Not-A-Number' during 'DEM = spm_LAP(DEM);'
I would be very happy if someone would give me advice on this matter.
Best,
Jung
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