posthocTGH: posthocTGH

In toshi-ara/compwrap: Wrapper functions of brunner.munzel.test and posthocTGH

Description

This function is used by the 'oneway' function for oneway analysis of variance in case a user requests post-hoc tests using the Tukey or Games-Howell methods. This function is a wrapper of userfriendlyscience::posthocTGH by Gjalt-Jorn Peters (Open University of the Netherlands) & Jeff Bagget (University of Wisconsin - La Crosse) Please see userfriendlyscience package.

Usage

posthocTGH(...)

## Default S3 method:
posthocTGH(y, x, method = c("games-howell", "tukey"),
  conf.level = 0.95, digits = 2, p.adjust = "none",
  formatPvalue = TRUE, ...)

## S3 method for class 'formula'
posthocTGH(formula, data, subset, na.action, ...)

Arguments

...	further arguments to be passed to or from methods (this argument is only for formula).
y	y has to be a numeric vector.
x	x has to be vector that either is a factor or can be converted into one.
method	Which post-hoc tests to conduct. Valid values are "tukey" and "games-howell".
conf.level	Confidence level of the confidence intervals.
digits	The number of digits to show in the output.
p.adjust	Any valid p.adjust method.
formatPvalue	Whether to format the p values according to APA standards (i.e. replace all values lower than .001 with '<.001'). This only applies to the printing of the object, not to the way the p values are stored in the object.
formula	A formula specifying the model.
data	an optional matrix or data frame (or similar: see model.frame) containing the variables in the formula formula. By default the variables are taken from environment(formula).
subset	an optional vector specifying a subset of observations to be used.
na.action	a function which indicates what should happen when the data contain NAs. Defaults to getOption("na.action").

Value

A list of three elements:

input	List with input arguments
intermediate	List of intermediate objects.
output	List with two objects 'tukey' and 'games.howell', containing the outcomes for the respective post-hoc tests.

Examples

### Compute post-hoc statistics using the tukey method
posthocTGH(y=ChickWeight$weight, x=ChickWeight$Diet, method="tukey")
posthocTGH(weight ~ Diet, data = ChickWeight, method="tukey")

### Compute post-hoc statistics using the games-howell method
posthocTGH(y=ChickWeight$weight, x=ChickWeight$Diet)
posthocTGH(weight ~ Diet, data = ChickWeight)

toshi-ara/compwrap documentation built on May 23, 2019, 8:19 p.m.