Dear Upasna, I apologize for responding so late, but I was out of town when you posted your query to r-help.
The sem() function in the sem package can handle dichotomous and ordered categorical observed variables via tetrachoric, polychoric, biserial, and polyserial correlations computed by the polycor package. See in particular the hetcor() function in that package, which can compute "heterogeneous" correlation matrices. Standard errors for parameter estimates in the SEM can then be computed by bootstrapping; see ?boot.sem in the sem package for an example with a confirmatory factor-analysis model for ordinal observed variables. I hope that this helps, John ------- original message ------- Hi I am looking for a structural equation modeling package in R which can be used for categorical data. Is anyone aware of the existence of such a package? Would appreciate any help on this. Thank you Upasna -- --------------------------------------------------------------------- Upasna Sharma Research Scholar Shailesh J. Mehta School of Management, Indian Institute of Technology, Bombay Powai, Mumbai - 400076, India -------------------------------- John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox ______________________________________________ R-help@stat.math.ethz.ch 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.
