https://github.com/cran/fields
Tip revision: ca1b621280412ef00fbb00b121ae8782c730a345 authored by Douglas Nychka on 30 October 2021, 12:40:02 UTC
version 13.3
version 13.3
Tip revision: ca1b621
ozone.Rd
%#
%# fields is a package for analysis of spatial data written for
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\name{Chicago ozone test data}
\alias{ChicagoO3}
\alias{ozone}
\title{
Data set of ozone measurements at 20 Chicago monitoring stations.
}
\description{
This data set used be named \code{ozone} but was
changed to avoid conflict with other packages.
The \code{ChicagoO3} 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.
These data are used extensively for the test scripts and
simple examples. The lasting scientific value is probably
minimal.
}
\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(ChicagoO3$x, ChicagoO3$y)
# fitting a surface to ozone measurements.
surface( fit, type="I")
}
\keyword{datasets}
% docclass is function
% Converted by Sd2Rd version 1.21.