mosaic (version 0.8-18)

TukeyHSD.lm: Additional interfaces to TukeyHSD

Description

TukeyHSD requires use of aov. Since this is a hinderence for beginners, wrappers have been provided to remove this need.

Usage

## S3 method for class 'lm':
TukeyHSD(x, which, ordered = FALSE, conf.level = 0.95, ...)
## S3 method for class 'formula':
TukeyHSD(x, which, ordered = FALSE, conf.level = 0.95,
  data = parent.frame(), ...)

Arguments

x

an object, for example of class lm or formula

data

a data frame. NB: This does not come second in the argument list.

which,ordered,conf.level,...

just as in TukeyHSD from the base package

Examples

## These should all give the same results
model <- lm(age ~ substance, data=HELPrct)
TukeyHSD(model)
TukeyHSD( age ~ substance, data=HELPrct)
TukeyHSD(aov(age ~ substance, data=HELPrct))