| % File src/library/datasets/man/airquality.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2007 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{airquality} |
| \docType{data} |
| \alias{airquality} |
| \title{New York Air Quality Measurements} |
| \description{ |
| Daily air quality measurements in New York, May to September 1973. |
| } |
| \usage{airquality} |
| \format{ |
| A data frame with 153 observations on 6 variables. |
| |
| \tabular{rlll}{ |
| \code{[,1]} \tab \code{Ozone} \tab numeric \tab Ozone (ppb)\cr |
| \code{[,2]} \tab \code{Solar.R} \tab numeric \tab Solar R (lang)\cr |
| \code{[,3]} \tab \code{Wind} \tab numeric \tab Wind (mph)\cr |
| \code{[,4]} \tab \code{Temp} \tab numeric \tab Temperature (degrees F)\cr |
| \code{[,5]} \tab \code{Month} \tab numeric \tab Month (1--12)\cr |
| \code{[,6]} \tab \code{Day} \tab numeric \tab Day of month (1--31) |
| } |
| } |
| \details{ |
| 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. |
| } |
| } |
| \source{ |
| The data were obtained from the New York State Department of |
| Conservation (ozone data) and the National Weather Service |
| (meteorological data). |
| } |
| \references{ |
| Chambers, J. M., Cleveland, W. S., Kleiner, B. and Tukey, P. A. (1983) |
| \emph{Graphical Methods for Data Analysis}. |
| Belmont, CA: Wadsworth. |
| } |
| \examples{ |
| require(graphics) |
| pairs(airquality, panel = panel.smooth, main = "airquality data") |
| } |
| \keyword{datasets} |