Add Text Labels to Plot with textxy() Function in R (2 Examples)

On this page, I’ll illustrate how to apply the textxy function to add text labels to graphics in R.

Preparing the Examples

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
plot(iris$Sepal.Length,        # Creating plot without text
     iris$Sepal.Width)

r graph figure 1 add text labels textxy function r

install.packages("calibrate")  # Install calibrate package
library("calibrate")           # Load calibrate

Example 1: Annotate Single Text Element to Base R Plot Using textxy() Function

plot(iris$Sepal.Length,        # Creating plot without text
     iris$Sepal.Width)
textxy(X = 5,                  # Write text to graphic
       Y = 3.5,
       labs = "Text Element")

r graph figure 2 add text labels textxy function r

Example 2: Annotate Multiple Text Elements with Different Positions, Sizes & Colors

plot(iris$Sepal.Length,        # Creating plot without text
     iris$Sepal.Width)
textxy(X = 4:6,                # Write text to graphic
       Y = 2:4,
       labs = paste("Text Element No.", 1:3),
       cex = 1.5,
       col = 2:4)

r graph figure 3 add text labels textxy function r

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