The reason I was working with a correlation matrix is because I wanted
to calculate polychoric correlations first before submitting it to the
actual sem command. I was unsure whether R would use polychoric
correlations when indicating which of the variables are ordered. A final
question on the sam
Dear Yves
Many thanks for your quick reply, I really appreciate it!
The reason I was working with a correlation matrix is because I wanted to
calculate polychoric correlations first before submitting it to the actual
sem command. I was unsure whether R would use polychoric correlations when
indic
Dear Laura,
John is correct. The error is produced by the sem() function in the
lavaan package. The reason is that you did not use proper names for the
function arguments. The correct call should be:
sem.cdu= sem(cdu, sample.cov=hetcor, sampl.nobs=1861,
meanstructure=F,fixed.x=F)
But more
Dear Laura,
As I explained to you when you wrote to me directly, you're not having trouble
with the polycor package, since you have AFAICS successfully computed
polychoric correlation among your variables. The error is produced when you
call sem(), apparently in the lavaan package (though you d
I am currently working with R's polycor package and I have encountered a
problem. I tried to follow the steps as outlined in the sem.pdf file where
a CFA model is run using polychoric correlations. Every time I run the
command sem(model, data, N=.), I get the following warning message:
Warning mess
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