R Force Origin of Axes in ggplot2 Plot to Start at Zero (Example Code)
In this R tutorial you’ll learn how to set the lower axis limit to zero.
Preparing the Example
data(iris) # Load iris data set 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("ggplot2") # Install & load ggplot2 package library("ggplot2") |
my_plot <- ggplot(iris, # Creating default ggplot2 graphic aes(x = Sepal.Width, y = Sepal.Length)) + geom_point() my_plot # Drawing default ggplot2 graphic |
Example: Setting the Axis Origins of a ggplot2 Graph to Zero
my_plot + # Begin ggplot2 axes at zero scale_x_continuous(expand = c(0, 0), limits = c(0, max(iris$Sepal.Width))) + scale_y_continuous(expand = c(0, 0), limits = c(0, max(iris$Sepal.Length))) |
Related Articles & Further Resources
Please have a look at the following tutorials. They illustrate topics such as graphics in R, plot legends, and ggplot2.