Count and continuous variables in PPLGM PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
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 Angela Bryan posted on Thursday, January 18, 2007 - 6:38 pm
I am attempting to run a parallel process LGM with 497 cases. One variable is Poisson distributed so I use the COUNT option. The other variable is normally distributed. We have four timepoints for each variable. When I run the LGMs of the two variables separately, they converge nicely and I have two good-fitting models. When I try to put them together in a parallel process model, nothing I do seems to help them converge. Is the problem that you simply cannot have one count and one continuous variable in a PPLGM? I couldn't find any information in the manual, so thought I would turn to the discussion board. Thanks for any help you might be able to provide!
 Linda K. Muthen posted on Thursday, January 18, 2007 - 9:29 pm
You can have count and continuous variables in the same model. Please send your input, data, output, and license number to support@statmodel.com and we will see if we can solve the problem.
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