https://github.com/cran/fields
Tip revision: 32c60b2ec8167f7d2b26f55147b4e380a8ad77b3 authored by Doug Nychka on 25 September 2011, 00:00:00 UTC
version 6.6.1
version 6.6.1
Tip revision: 32c60b2
ozone.Rd
% fields, Tools for spatial data
% Copyright 2004-2011, Institute for Mathematics Applied Geosciences
% University Corporation for Atmospheric Research
% Licensed under the GPL -- www.gpl.org/licenses/gpl.html
\name{ozone}
\alias{ozone}
\title{
Data set of ozone measurements at 20 Chicago monitoring stations.
}
\description{
The \code{ozone} data is a list of
components, x and y. x
component is longitude and latitude position of each of the 20
Chicago monitoring stations, y is the average
daily ozone values over the time period 6/3/87-8/30/87.
}
\format{
This data set is a list containing the following components:
\describe{
\item{lon.lat}{ Longitude-latitude positions of monitoring stations. }
\item{x}{An approximate Cartesian set of coordinates for the locations
where the units are in miles. The origin is in the center of the
locations. }
\item{y}{ Average daily ozone values over 1987 summer. }
}
}
\source{
AIRS, the EPA air quality data base.
}
\seealso{
Tps, Krig
}
\examples{
fit<- Tps(ozone$x, ozone$y)
# fitting a surface to ozone measurements.
surface( fit, type="I")
}
\keyword{datasets}
% docclass is function
% Converted by Sd2Rd version 1.21.