ozone {fields}R Documentation

Data set of ozone measurements at 20 Chicago monitoring stations.

Description

The 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.

Usage

data(ozone)

Format

This data set is a list containing the following components:

lon.lat
Longitude-latitude positions of monitoring stations.
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.
y
Average daily ozone values over 1987 summer.

Source

AIRS, the EPA air quality data base.

See Also

Tps, Krig

Examples

fit<- Tps(ozone$x, ozone$y) 
# fitting a surface to ozone measurements. 
surface( fit, type="I")

[Package fields version 3.3.1 Index]