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, John > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Simo Vundla > Sent: May-25-09 10:12 AM > To: r-help@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 says: > > is.triangular(S) : (list) object cannot be coerced > to 'double' > > Do not know what the problem is. Have done something almost similar without > any problems. > > Thanks very much > > Simo > > > > [[alternative HTML version deleted]] ______________________________________________ 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.
