On 07/30/2012 11:00 PM, Luna wrote:
Dear R users, I have a hard time interpreting the covariances in the parameter estimates output (standardized), even in the example documented (PoliticalDemocracy). Can anyone tell me if the estimated covariances are residual covariances (unexplained by the model), or the covariances of the observable variables?
They are *residual* covariances.
I haved checked the data and it does not look like the covariances of the observable variables, however when I tried to find out using simulated data ( with correlated residuals) the estimates did not seem to be the covariance of the residuals either (much much underestimated). Can anyone help?
How did you simulate your data? It is rather tricky to generate data under a known CFA/SEM model with pre-specified residual (co)variances.
Yves Rosseel. http://lavaan.org ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
