On Sat, Feb 6, 2010 at 4:45 AM, Martin Bulla <bu...@centrum.cz> wrote: > Does anybody knows what this error message means: Error in object$terms : $ > operator not defined for this S4 class
The error message means what it says and it doesn't come from lmer, it comes from the drop1 function being applied to a model fit by lmer. You are assuming that you can apply drop1 to an lmer model and you can't. You need to do the modifications of the model formula by hand because an lmer formula contains terms that would not be meaningful for drop1. > I have peformed the following steps: > > >> library(lattice) > >> library(Matrix) > >> library(lme4) > >> inkm inkm$Gamie glm.incm drop1(glm.incm,test="Ch") Error in object$terms : >> $ operator not defined for this S4 class > > > Your suggestin would be of a greatl help to me, > Martin > > > ______________________________________________ > 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.
