How to Compute Skewness & Kurtosis of Data Vector in R (2 Examples)

This page illustrates how to compute skewness and kurtosis in the R programming language.

Preparing the Examples

data(iris)                         # Load example data frame
head(iris)
#   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1          5.1         3.5          1.4         0.2  setosa
# 2          4.9         3.0          1.4         0.2  setosa
# 3          4.7         3.2          1.3         0.2  setosa
# 4          4.6         3.1          1.5         0.2  setosa
# 5          5.0         3.6          1.4         0.2  setosa
# 6          5.4         3.9          1.7         0.4  setosa
install.packages("moments")        # Install & load moments package
library("moments")

Example 1: Calculating Skewness of Data Vector

skewness(iris$Sepal.Length)        # Computing skewness
# [1] 0.3117531

Example 2: Calculating Kurtosis of Data Vector

kurtosis(iris$Sepal.Length)        # Computing kurtosis
# [1] 2.426432

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