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4.2817
2005 Sep 16
4
Possible bug in lmer nested analysis with factors
Hello,
Is this a bug in the lmer routine?
> library(lme4)
> ### test case based on rats data from Crawley
> a<-rnorm(36);b<-rep(1:3,each=12);c<-rep(1:2,each=6,3);d<-rep
(1:3,each=2,6)
>
> ### mixed model works when c & d are numeric, lmer assumes they
are factors
> m <- lmer(a ~ b + (1|c/d))
>
> ### but bails out when they are actually