Thomas Stewart <tgstewart <at> gmail.com> writes: > If I have the mixed-model with > > lmer( y ~ x1 + x2 + (1 | id) + (z1 | w ) , ... ) > > there is no way for me to specify a correlation structure for the random > effects? Right? > > If I want to specify correlation structure then I need to use lme in the > nlme package? Right? Crossed Random effects are coded with the pdBlocked > syntax? Right?
Right on all counts (see Pinheiro and Bates 2000 for details of crossed-effect coding with pdBlocked). In general it might be better to send these types of questions to r-sig-mixed-models instead of r-help ... ______________________________________________ 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.
