R Under development (unstable) (2024-06-18 r86781 ucrt) -- "Unsuffered Consequences"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: x86_64-w64-mingw32/x64

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> if (.Platform$OS.type != "windows") withAutoprint({
+     library(lme4)
+ 
+     fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
+ 
+     ## slightly weird model but plausible --- not that
+     ##   one would want to try drop1() on this model ...
+     fm2 <- lmer(Reaction ~ 1+ (Days|Subject), sleepstudy)
+     drop1(fm2)  ## empty
+     update(fm1, . ~ . - Days)
+     anova(fm2) ## empty
+ 
+     terms(fm1)
+     terms(fm1,fixed.only=FALSE)
+ 
+     extractAIC(fm1)
+ 
+     drop1(fm1)
+     drop1(fm1, test="Chisq")
+ 
+     gm1 <- glmer(cbind(incidence, size - incidence) ~ period + (1 | herd),
+                  family = binomial, data = cbpp, nAGQ=25L)
+ 
+     drop1(gm1, test="Chisq")
+ 
+ }) ## skip on windows (for speed)
> 
> proc.time()
   user  system elapsed 
   0.07    0.06    0.12