shapiro_test {rstatix} | R Documentation |
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.
shapiro_test(data, ..., vars = NULL)
mshapiro_test(data)
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. |
a data frame containing the value of the Shapiro-Wilk statistic and the corresponding p.value.
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.
# 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])