R How to Create a ggplot2 Graph of a Data Frame Subset (Example Code)

In this R tutorial you’ll learn how to create a ggplot2 plot of a data frame subset.

Setting up the Example

data(iris)                                                  # Loading iris data set
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
ggplot(iris,                                                # Plotting entire data frame
       aes(x = Sepal.Width,
           y = Sepal.Length,
           col = Species)) +
  geom_point()

r graph figure 1 r create ggplot2 graph data frame subset

Example: Draw ggplot2 Graph of Selected Data Frame Rows

ggplot(iris[iris$Species %in% c("setosa", "virginica"), ],  # Create ggplot2 plot of subset
       aes(x = Sepal.Width,
           y = Sepal.Length,
           col = Species)) +
  geom_point()

r graph figure 2 r create ggplot2 graph data frame subset

Further Resources & Related Tutorials

Have a look at the following R programming language tutorials. They explain similar topics as this post:

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