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R Data Analysis Cookbook - Second Edition by Kuntal Ganguly

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Creating boxplots

Create a boxplot for mpg, using the following command:

> boxplot(mpg, xlab = "Miles per gallon") 

The following diagram is the boxplot:

To generate boxplots for subsets within the whole dataset, you can use:

> boxplot(mpg ~ model_year, xlab = "Miles per gallon")  

The following diagram is the boxplot:

Now generate a boxplot of mpg by cylinders:

> boxplot(mpg ~ cylinders)  

The following diagram is the boxplot:

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