Draw ggplot2 Plot Based On One Variable in R (Example Code)
In this tutorial, I’ll explain how to draw a single variable in a ggplot2 dotplot in R.
Setting up the Example
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
install.packages("ggplot2") # Install ggplot2 package library("ggplot2") # Load ggplot2 |
install.packages("ggplot2") # Install ggplot2 package library("ggplot2") # Load ggplot2
Example: Draw One Variable in ggplot2 Scatterplot
ggplot(iris, # Plot only one variable aes(x = 1:nrow(iris), y = Sepal.Width)) + geom_point() |
ggplot(iris, # Plot only one variable aes(x = 1:nrow(iris), y = Sepal.Width)) + geom_point()
Further Resources & Related Articles
Have a look at the following R programming tutorials. They explain topics such as ggplot2, plot legends, and graphics in R: