A box plot

boxplot plots the given data in a box plot. If a second categorical variable is given, the data is grouped by this variable.

Usage

boxplot(
  response,
  explanatory = NULL,
  main = "",
  xlab = "",
  ylab = substitute(explanatory)
)

Arguments

response

Vector of numeric values to plot.

explanatory

Optional second categorical variable to group by.

main

Optional title for the plot

xlab

Optional x-axis label for the plot

ylab

Optional y-axis label for the plot. Only displayed when explanatory is provided.

Value

A box plot.

Examples

boxplot(
  mtcars$mpg,
  main = "mtcars Cylinders Dotplot",
  xlab = "Number of Cylinders"
)

boxplot(
  mtcars$mpg,
  mtcars$am,
  main = "Automatic Cars Have Better Mileage on Average",
  xlab = "Mileage (miles per gallon)",
  ylab = "Automatic (yes coded as 1)"
)