A dot plot

dotplot creates a horizontal dot plot. If a second categorical variable is given, the data is grouped by this variable. Use names & mytitle to specify the labels and title.

Usage

dotplot(
  response,
  explanatory = NULL,
  main = "",
  xlab = substitute(response),
  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 dot plot.

Examples

dotplot(
  mtcars$cyl,
  main = "mtcars Cylinders Dotplot",
  xlab = "Number of Cylinders"
)

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