R Under development (unstable) (2024-06-30 r86854 ucrt) -- "Unsuffered Consequences"
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> ## library(lme4.0)
> ## Emacs M-<Enter> --> setwd() correctly
> 
> ## m0.0 <- glm(colonizers~Treatment*homespecies*respspecies, data=randdat, family=poisson)
> ## with(randdat,tapply(colonizers,list(Treatment,homespecies,respspecies),sum))
> ## summary(m1.0 <- glmer(form1, data=randdat, family=poisson))
> ## summary(m2.0 <- glmer(form2, data=randdat, family=poisson))
> 
> 
> ## detach("package:lme4.0", unload=TRUE)
> 
> load(system.file("testdata","colonizer_rand.rda",package="lme4"))
> library("lme4")
Loading required package: Matrix
> packageVersion("lme4")
[1] '1.1.35.5'
> 
> if (.Platform$OS.type != "windows") {
+ m1 <- glmer(form1,data=randdat, family=poisson)  ## PIRLS step failed
+ m2 <- glmer(form1,data=randdat, family=poisson, nAGQ=0)  ## OK
+ m3 <- glmer(form2,data=randdat, family=poisson)  ## ditto
+ 
+ } ## skip on windows (for speed)
> 
> proc.time()
   user  system elapsed 
   1.07    0.07    1.14