lmerTest (version 2.0-32)

lmer: Fit Linear Mixed-Effects Models

Description

Fit a linear mixed model

Value

An object of class "merModLmerTest"

Details

This lmer function is an overloaded function of lmer (merMod class from lme4 package).

See Also

merModLmerTest class

Examples

library(lmerTest)

## linear mixed models
fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
fm2 <- lmer(Reaction ~ Days + (1|Subject) + (0+Days|Subject), sleepstudy)

# anova table the same as of class merMod but with additional F statistics and  
# p-values calculated based on Satterthwaite's approximations
anova(fm1)

# anova table the same as of class merMod but with additional F statistics and  
# p-values calculated based on Kenward-Roger's approximations
## Not run: 
# if(requireNamespace("pbkrtest", quietly = TRUE))
# anova(fm1, ddf="Kenward-Roger")
# 
# # anova table the same as of class merMod
# anova(fm1, ddf="lme4")
# ## End(Not run)

# gives summary of merModLmerTest class. The same as of class merMod but with
# additional p-values calculated based on Satterthwate's approximations
summary(fm1)

## multiple comparisons statistics. The one from lme4 package
## Not run: 
# anova(fm1, fm2)
# ## End(Not run)