R Programming Fundamentals

Activity: Recreating Plots Using ggplot2

The following code can be used to load the datasets library:

library(ggplot2)

The following code can be used to create a histogram to plot petal width:

ggplot(iris, aes(Petal.Width)) + geom_histogram(binwidth = 0.5)

The following code can be used to create a scatterplot to plot petal length and width:

ggplot(iris, aes(Petal.Width, Petal.Length)) + geom_point()

The following code can be used to create a boxplot to plot petal length and the Species factor variable:

ggplot(iris, aes(as.factor(Species), Petal.Width)) + geom_boxplot()

The following code can be used to create a bar chart using the gear variable of the mtcars dataset:

ggplot(mtcars, aes(gear)) + geom_bar()