How to Annotate Text to a ggplot2 Graph in R (Example Code)

This article illustrates how to annotate text elements to ggplot2 graphics in the R programming language.

Preparing the Example

data(iris)                 # 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
install.packages("ggplot2")# Install ggplot2 package
library("ggplot2")         # Load ggplot2 package
ggp <- ggplot(iris,        # ggplot2 graph without text
              aes(Sepal.Length,
                  Sepal.Width)) +
  geom_point()
ggp

r graph figure 1 annotate text ggplot2 graph

Example: Adding Text Element to ggplot2 Plot Using annotate() Function

ggp +                      # Annotating text to ggplot2 graph
  annotate("text",
           x = 6.8,
           y = 4,
           label = "This is my text!",
           col = "orange",
           size = 8)

r graph figure 2 annotate text ggplot2 graph

Further Resources & Related Tutorials

Below, you can find some additional resources that are related to the content of this post.

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