Hi Ben, Pinheiro and Bates 2000 is the "real" documentation for nlme. See the Cell Culture Bioassay example starting on pg 163 for a demonstration of fitting crossed random effects using pdIdent and pdBlocked objects.
hth, Kingsford On Tue, Sep 1, 2009 at 6:44 AM, bamsel<benam...@gmail.com> wrote: > > Hello R users, > I've read the posts on this topic, and had a look at the R documentation for > nlme, but I can't seem to make this work. I'd like to be able to fit a mixed > effects model with crossed random effects, but also be able to specify the > covariance matrix structure for the residuals. Here's the syntax using the > lmer function in lme4 (which doesn't currently allow alternate error > covariance structures). Does anybody know how to transform this to work with > nlme? > > fit = lmer(data$DV ~ X + time + (X*time) + (1|Item_Number) + (1|Subject), > data) > > Much appreciated, > Ben Amsel > -- > View this message in context: > http://www.nabble.com/Syntax-for-crossed-random-effects-in-nlme-tp25239714p25239714.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. > ______________________________________________ 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.
