rstatix: shapiro_test – R documentation

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shapiro_test

Shapiro-Wilk Normality Test

Description

Provides a pipe-friendly framework to performs Shapiro-Wilk test of normality. Support grouped data and multiple variables for multivariate normality tests. Wrapper around the R base function shapiro.test(). Can handle grouped data. Read more: Normality Test in R.

Usage

shapiro_test(data, ..., vars = NULL)

mshapiro_test(data)

Arguments

`data`	a data frame. Columns are variables.
`...`	One or more unquoted expressions (or variable names) separated by commas. Used to select a variable of interest.
`vars`	optional character vector containing variable names. Ignored when dot vars are specified.

Value

a data frame containing the value of the Shapiro-Wilk statistic and the corresponding p.value.

Functions

shapiro_test: univariate Shapiro-Wilk normality test
mshapiro_test: multivariate Shapiro-Wilk normality test. This is a modified copy of the mshapiro.test() function of the package mvnormtest, for internal convenience.

Examples

# Shapiro Wilk normality test for one variable
iris %>% shapiro_test(Sepal.Length)

# Shapiro Wilk normality test for two variables
iris %>% shapiro_test(Sepal.Length, Petal.Width)

# Multivariate normality test
mshapiro_test(iris[, 1:3])

rstatix

Pipe-Friendly Framework for Basic Statistical Tests

v0.7.0

GPL-2

Authors

Alboukadel Kassambara [aut, cre]

Initial release