mosaic: TukeyHSD.lm – R documentation

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TukeyHSD.lm

Additional interfaces to TukeyHSD

Description

TukeyHSD() requires use of aov(). Since this is a hindrance 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`
`which, ordered, conf.level, ...`	just as in `TukeyHSD()` from the `base` package
`data`	a data frame. NB: This does not come second in the argument list.

Examples

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

mosaic

Project MOSAIC Statistics and Mathematics Teaching Utilities

v1.8.3

GPL (>= 2)

Authors

Randall Pruim [aut, cre], Daniel T. Kaplan [aut], Nicholas J. Horton [aut]

Initial release