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\name{Fuel economy}
\docType{data}
\alias{mpg}
\title{Fuel economy data from 1999 and 2008 for 38 popular models of car}
\description{
This dataset contains a subset of the fuel economy data that the EPA makes available on \url{http://fueleconomy.gov}. It contains only models which had a new release every year between 1999 and 2008 - this was used as a proxy for the popularity of the car.
\itemize{
\item manufacturer.
\item model.
\item displ. engine displacement, in litres
\item year.
\item cyl. number of cylinders
\item trans. type of transmission
\item drv. f = front-wheel drive, r = rear wheel drive, 4 = 4wd
\item cty. city miles per gallon
\item hwy. highway miles per gallon
\item fl.
\item class.
}
}
\usage{data(mpg)}
\format{A data frame with 234 rows and 11 variables}
\keyword{datasets}
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