\HeaderA{airquality}{New York Air Quality Measurements}{airquality}
\keyword{datasets}{airquality}
\begin{Description}\relax
Daily air quality measurements in New York, May to September 1973.
\end{Description}
\begin{Usage}
\begin{verbatim}airquality\end{verbatim}
\end{Usage}
\begin{Format}\relax
A data frame with 154 observations on 6 variables.

\Tabular{rlll}{
\code{[,1]} & \code{Ozone}   & numeric & Ozone (ppb)\\
\code{[,2]} & \code{Solar.R} & numeric & Solar R (lang)\\
\code{[,3]} & \code{Wind}    & numeric & Wind (mph)\\
\code{[,4]} & \code{Temp}    & numeric & Temperature (degrees F)\\
\code{[,5]} & \code{Month}   & numeric & Month (1--12)\\
\code{[,6]} & \code{Day}     & numeric & Day of month (1--31)
}
\end{Format}
\begin{Details}\relax
Daily readings of the following air quality values for May 1, 1973 (a
Tuesday) to September 30, 1973.

\Itemize{
\item \code{Ozone}: Mean ozone in parts per
billion from 1300 to 1500 hours at Roosevelt Island
\item \code{Solar.R}: Solar radiation
in Langleys in the frequency band 4000--7700 Angstroms from
0800 to 1200 hours at Central Park
\item \code{Wind}: Average wind speed in miles
per hour at 0700 and 1000 hours at LaGuardia Airport
\item \code{Temp}: Maximum daily
temperature in degrees Fahrenheit at La Guardia Airport.
}
\end{Details}
\begin{Source}\relax
The data were obtained from the New York State Department of
Conservation (ozone data) and the National Weather Service
(meteorological data).
\end{Source}
\begin{References}\relax
Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey, P. A. (1983)
\emph{Graphical Methods for Data Analysis}.
Belmont, CA: Wadsworth.
\end{References}
\begin{Examples}
\begin{ExampleCode}
pairs(airquality, panel = panel.smooth, main = "airquality data")
\end{ExampleCode}
\end{Examples}