How to Apply the mtext() Function in R (Example Code)

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

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

plot(iris$Sepal.Length,                       # Base R scatterplot
     iris$Petal.Length)

plot(iris$Sepal.Length, # Base R scatterplot iris$Petal.Length)

plot(iris$Sepal.Length,                       # Base R scatterplot
     iris$Petal.Length)
mtext("Some additional text for my graph",    # Annotate text to plot
      side = 4,
      col = "purple",
      cex = 2)

plot(iris$Sepal.Length, # Base R scatterplot iris$Petal.Length) mtext("Some additional text for my graph", # Annotate text to plot side = 4, col = "purple", cex = 2)