rstatix: kruskal_test – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

kruskal_test

Kruskal-Wallis Test

Description

Provides a pipe-friendly framework to perform Kruskal-Wallis rank sum test. Wrapper around the function kruskal.test().

Usage

kruskal_test(data, formula, ...)

Arguments

`data`	a data.frame containing the variables in the formula.
`formula`	a formula of the form `x ~ group` where `x` is a numeric variable giving the data values and `group` is a factor with one or multiple levels giving the corresponding groups. For example, `formula = TP53 ~ cancer_group`.
`...`	other arguments to be passed to the function `kruskal.test`.

Value

return a data frame with the following columns:

.y.: the y variable used in the test.
n: sample count.
statistic: the kruskal-wallis rank sum statistic used to compute the p-value.
p: p-value.
method: the statistical test used to compare groups.

Examples

# Load data
#:::::::::::::::::::::::::::::::::::::::
data("ToothGrowth")
df <- ToothGrowth

# Kruskal-wallis rank sum test
#:::::::::::::::::::::::::::::::::::::::::
df %>% kruskal_test(len ~ dose)

# Grouped data
df %>%
  group_by(supp) %>%
  kruskal_test(len ~ dose)

rstatix

Pipe-Friendly Framework for Basic Statistical Tests

v0.7.0

GPL-2

Authors

Alboukadel Kassambara [aut, cre]

Initial release