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Mplus Discussion > Confirmatory Factor Analysis >
 Gao Yan posted on Wednesday, September 15, 2010 - 2:10 am
Hi, I am doing the data simulation in mplus. my model is

a with b;
ab | a xwwith b;
c on a b ab;
d on a c;

but it was said the the covariance matrix is not positive.
after tried different ways. I find that when you define the algorithm=integration which is a must when you use xwith, there will be the same problem when you use with as well.

Hope I can get help here! Thanks!
 Linda K. Muthen posted on Wednesday, September 15, 2010 - 9:31 am
See mcex5.13.inp which is a Monte Carlo input for a model with a latent variable interaction. You must provide population parameter values for a simulation study. See also the Monte Carlo examples chapter and the chapter on the MONTECARLO command in the user's guide.
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