Draw ggplot2 Plot of Table Object in R (Example Code)
In this article, I’ll explain how to create a plot based on a table object in R programming.
Example Data
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 |
iris_tab <- table(iris$Species) # Table of column iris_tab # setosa versicolor virginica # 50 50 50 |
Example: ggplot2 Plot of Table Converted to Data Frame
iris_df <- as.data.frame(iris_tab) # Change class of data iris_df # Display data.frame in RStudio console # Var1 Freq # 1 setosa 50 # 2 versicolor 50 # 3 virginica 50 |
install.packages("ggplot2") # Install ggplot2 package library("ggplot2") # Load ggplot2 package |
ggplot(iris_df, aes(x = Var1, y = Freq)) + # Draw table geom_bar(stat = "identity") |
Further Resources
Have a look at the following R tutorials. They focus on topics such as graphics in R, ggplot2, and data objects.