Make Plot Axes Square Shaped in Base R & ggplot2 (2 Examples)

This article illustrates how to create square shaped axes in a plot in R programming.

Example Data

data(iris)                     # Load example data
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

Example 1: Force Plot Axes to be Squared Using Base R

plot(iris$Petal.Length,        # Base R plot with squared axes
     iris$Petal.Width,
     asp = 1)

r graph figure 1 make axes square shaped base r ggplot2

Example 2: Force Plot Axes to be Squared Using ggplot2 Package

install.packages("ggplot2")    # Install & load ggplot2 package
library("ggplot2")
ggplot(iris,                   # ggplot2 plot with squared axes
       aes(x = Petal.Length,
           y = Petal.Width)) +
  geom_point() +
  theme(aspect.ratio = 1)

r graph figure 2 make axes square shaped base r ggplot2

Further Resources

Have a look at the following R programming tutorials. They explain topics such as ggplot2 and graphics in R.

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