userfriendlyscience (version 0.7.2)

posthocTGH: 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.

Usage

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

Arguments

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.

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

# NOT RUN {
### Compute post-hoc statistics using the tukey method
posthocTGH(y=ChickWeight$weight, x=ChickWeight$Diet, method="tukey");
### Compute post-hoc statistics using the games-howell method
posthocTGH(y=ChickWeight$weight, x=ChickWeight$Diet);
# }