R Modify Fill & Border Colors of ggplot2 Scatterplot (Example Code)

In this article, I’ll show how to adjust fill and border colors of ggplot2 graphs in the R programming language.

Setting up the Example

data(iris)                     # Loading iris 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 & load ggplot2 package
library("ggplot2")
my_plot <- ggplot(iris,        # Creating ggplot2 graphic
              aes(x = Sepal.Length,
                  y = Sepal.Width,
                  color = Species,
                  fill = Species)) +
  geom_point(size = 3,
             shape = 21,
             stroke = 1)
my_plot                        # Drawing ggplot2 graphic

r graph figure 1 r modify fill border colors ggplot2 scatterplot

Example: Adjusting Fill & Border Color of ggplot2 Graphic

my_plot +                      # Modifying fill & border colors
  scale_fill_manual(values = c("setosa" = "white",
                               "versicolor" = "orange",
                               "virginica" = "purple")) +
  scale_color_manual(values = c("setosa" = "red",
                                "versicolor" = "black",
                                "virginica" = "yellow"))

r graph figure 2 r modify fill border colors ggplot2 scatterplot

Related Tutorials & Further Resources

Below, you may find some further resources on topics such as colors, lines, and ggplot2.

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