How to Align Text & Line in ggplot2 Graph in R (Example Code)

This tutorial shows how to align text and lines in a ggplot2 plot in the R programming language.

Preparing the Example

data(iris)                     # Example data in R
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,        # Draw ggplot2 scatterplot
                  aes(x = Sepal.Length,
                      y = Petal.Length)) +
  geom_point()
my_plot

r graph figure 1 align text line ggplot2 graph

Example: Properly Align Line & Text in ggplot2 Plot Using Line Break

my_plot +                      # Annotate line & text elements
  geom_hline(yintercept = 2.5) +
  annotate("text",
           x = 6,
           y = 2.5,
           label = "Higher Valuesn") +
  annotate("text",
           x = 6,
           y = 2.5,
           label = "nLower Values")

r graph figure 2 align text line ggplot2 graph

Related Articles & Further Resources

You may find some related R programming tutorials in the following list.

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