Hi Harold: Yes, this was the R code that I tried, and got different result from SAS.
Is that mean I cannot actually use R to run unstructured covariance matrix? How can I solve this problem if I need an unstructured covariance matrix method? Thanks for the help. -- View this message in context: http://r.789695.n4.nabble.com/HLM-Model-tp3242999p3243158.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
