How to Modify X-Axis Labels of Boxplot in R (Example Code)

data(iris)                                 # Iris data set
iris_num <- iris[ , 1:4]                   # Extract numeric data
head(iris_num)                             # Head of data
#   Sepal.Length Sepal.Width Petal.Length Petal.Width
# 1          5.1         3.5          1.4         0.2
# 2          4.9         3.0          1.4         0.2
# 3          4.7         3.2          1.3         0.2
# 4          4.6         3.1          1.5         0.2
# 5          5.0         3.6          1.4         0.2
# 6          5.4         3.9          1.7         0.4

data(iris) # Iris data set iris_num <- iris[ , 1:4] # Extract numeric data head(iris_num) # Head of data # Sepal.Length Sepal.Width Petal.Length Petal.Width # 1 5.1 3.5 1.4 0.2 # 2 4.9 3.0 1.4 0.2 # 3 4.7 3.2 1.3 0.2 # 4 4.6 3.1 1.5 0.2 # 5 5.0 3.6 1.4 0.2 # 6 5.4 3.9 1.7 0.4

boxplot(iris_num)                          # Boxplot of iris data set

boxplot(iris_num) # Boxplot of iris data set

boxplot(iris_num, names = letters[1:4])    # Change axis labels of boxplot

boxplot(iris_num, names = letters[1:4]) # Change axis labels of boxplot