USprecip {spam} | R Documentation |
This is a useful spatial data set of moderate to large size consisting of 11918 locations. See www.image.ucar.edu/GSP/Data/US.monthly.met/ for the source of these data.
This data set is an array containing the following columns:
Longitude-latitude position of monitoring stations
Monthly total precipitation in millimeters for April 1948
Preipitation anomaly for April 1948.
Indicator, which station values were observed (5906 out of the 11918) compared to which were estimated.
www.image.ucar.edu/GSP/Data/US.monthly.met/
Johns, C., Nychka, D., Kittel, T., and Daly, C. (2003) Infilling sparse records of spatial fields. Journal of the American Statistical Association, 98, 796–806.
# plot ## Not run: library(fields) data(USprecip) par(mfcol=c(2,1)) quilt.plot(USprecip[,1:2],USprecip[,3]) US( add=TRUE, col=2, lty=2) quilt.plot(USprecip[,1:2],USprecip[,4]) US( add=TRUE, col=2, lty=2) ## End(Not run)