emmeans (version 1.5.3)

emm: Support for multcomp::glht

Description

These functions and methods provide an interface between emmeans and the multcomp::glht function for simultaneous inference provided by the multcomp package.

Usage

emm(...)
as.glht(object, ...)
# S3 method for emmGrid
as.glht(object, ...)

Arguments

...

In emm, the specs, by, and contr arguments you would normally supply to emmeans. Only specs is required. Otherwise, arguments that are passed to other methods.

object

An object of class emmGrid or emm_list

Value

emm returns an object of an intermediate class for which there is a multcomp::glht method.

as.glht returns an object of class glht or glht_list according to whether object is of class emmGrid or emm_list. See Details below for more on glht_lists.

Details

A glht_list object is simply a list of glht objects. It is created as needed -- for example, when there is a by variable. Appropriate convenience methods coef, confint, plot, summary, and vcov are provided, which simply apply the corresponding glht methods to each member.

Examples

# NOT RUN {
if(require(multcomp)) { # --- multcomp must be installed

warp.lm <- lm(breaks ~ wool*tension, data = warpbreaks)

# Using 'emm'
summary(glht(warp.lm, emm(pairwise ~ tension | wool)))

# Same, but using an existing 'emmeans' result
warp.emm <- emmeans(warp.lm, ~ tension | wool)
summary(as.glht(pairs(warp.emm)))

# Same contrasts, but treat as one family
summary(as.glht(pairs(warp.emm), by = NULL))

} # --- was tested only if multcomp is installed
# }