[R] SEM modelling

John Fox jfox at mcmaster.ca
Mon May 25 17:25:31 CEST 2009

Dear Simo,

Apparently the input covariance matrix is a list rather than a numeric
matrix. Without the input that you specified, it's not possible to know for
sure what you did, but I suspect that you used the object returned by
hetcor() in the polycor package rather than the polychoric correlation
matrix extracted from this object -- i.e., object$correlations.

I hope this helps,

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> Behalf Of Simo Vundla
> Sent: May-25-09 10:12 AM
> To: r-help at r-project.org
> Subject: [R] SEM modelling
> Dear All,
> I am trying to run a program using SEM and the input data is a covariance
> matrix (polychoric correlations). However I get an error message which
>                            is.triangular(S) : (list) object cannot be
> to 'double'
> Do not know what the problem is. Have done something almost similar
> any problems.
> Thanks very much
> Simo
> 	[[alternative HTML version deleted]]

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