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R Data Analysis Cookbook - Second Edition by Kuntal Ganguly

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Getting ready

Make sure that the auto-mpg.csv file is in the working directory of R. Read the file using the read.csv command and save in the auto variable. Convert cylinders to a factor variable. If you have not done so already, install the ggplot2 package as follows:

> install.packages("ggplot2")> library(ggplot2)> auto <- read.csv("auto-mpg.csv", stringsAsFactors=FALSE)> auto$cylinders <- factor(auto$cylinders,labels=c("3cyl","4cyl", "5cyl","6cyl","8cyl"))

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