Chicago ozone test data {fields}

Data set of ozone measurements at 20 Chicago monitoring stations.

Description

This data set used be named ozone but was changed to avoid conflict with other packages. The 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:

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(ChicagoO3$x, ChicagoO3$y) 
# fitting a surface to ozone measurements. 
surface( fit, type="I")