Hi,
I have been running longitudinal multivariate cholesky decomposition. This seems o run ok but the problem is comparing nested models to ACE model and the Saturated model.
The error message is:
Error: The following error occurred while evaluating the subexpression 'solve(sqrt(CholAE.I * CholAE.C))' during the evaluation of 'iSDc' in model 'CholAE' : Lapack routine dgesv: system is exactly singular: U[1,1] = 0
The code:
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Cholesky Decomposition AE Model
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CholAeModel <- mxModel( CholAceFit, name="CholAE" )
CholAeModel <- omxSetParameters( CholAeModel, labels=cLabs, free=FALSE, values=0 )
CholAeFit <- mxRun(CholAeModel)
mxCompare(CholAceFit, CholAeFit)