ozoneSub {HRW} | R Documentation |
Ozone levels in midwest U.S.A.
Description
This dataset is a subset of the ozone2 dataset in the fields package. It contains the 8-hour average ozone concentration at 147 sites in the midwest region of the U.S.
Usage
data(ozoneSub)
Format
A data frame with 147 observations on the following 3 variables:
longitude
observation longitude.
latitude
observation latitude.
ozone
ozone level.
Source
Aerometric Information Retrieval System, the U.S. Environmental Protection Agency air quality data base.
References
Nychka, D., Furrer, R., Paige, J. and Sain, S. (2017). fields: Tools for spatial data. R package version 9.0. https://www.r-project.org.
Examples
library(HRW) ; data(ozoneSub)
if (require("mgcv"))
{
fit.ozone.mgcv.tp <- gam(ozone ~ s(longitude,latitude,bs = "tp"),
data = ozoneSub,method = "REML")
plot(fit.ozone.mgcv.tp,scheme = 2,
main = "ozone concentration",bty = "l")
points(ozoneSub$longitude,ozoneSub$latitude)
}
if (require("fields"))
US(add = TRUE,lwd = 2)
[Package HRW version 1.0-5 Index]