How to Color Points of Scatterplot in R (2 Examples)

In this R tutorial you’ll learn how to draw a scatterplot with colors.

Setting up 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

Example 1: Create Base R Scatterplot with Colored Dots

plot(iris$Petal.Length,        # Drawing scatterplot with Base R
     iris$Petal.Width,
     pch = 16,
     col = iris$Species)

r graph figure 1 color points scatterplot

Example 2: Create ggplot2 Scatterplot with Colored Dots

install.packages("ggplot2")    # Install ggplot2 package
library("ggplot2")             # Load ggplot2
ggplot(iris,                   # Drawing scatterplot with ggplot2
       aes(x = Petal.Length,
           y = Petal.Width,
           col = Species)) +
  geom_point()

r graph figure 2 color points scatterplot

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