pcbs {GRASS} | R Documentation |
The pcbs
data frame has 70 rows and 3 columns.
It records contamination of the environment with polychlorinated biphenyls around the site of a large plant for the incineration of chemical wastes near Pontypool, South Wales.
data(pcbs)
This data frame contains the following columns:
The original data were positioned in relation to National Grid coordinates, and have been reprojected to UTM zone 30, using the WGS84 ellipsoid.
This dataset will only work if R is started from inside GRASS, choosing the location for the Pontypool PCBs data. GRASS installations differ in permissions needed to establish a new location, and system administrator privileges may be needed to create the Pontypool location. Information about the necessary metadataare as follows. The actual data may be accessed from R: data(pcbs)
.
Bailey, T. C., Gatrell, A. C. 1995 Interactive Spatial Data Analysis (Longman, Harlow); pages 149-150, courtesy of Andrew Lovett, School of Environmental Sciences, University of East Anglia.
data(pcbs) pcbs.o <- as.ordered(cut(pcbs$pcbs, labels=c("insignificant", "low", "medium", "high", "crisis"), breaks=c(1,20,100,500,1000,5000), include.lowest=TRUE)) table(pcbs.o) plot(pcbs$east, pcbs$north, pch=unclass(pcbs.o), xlab="", ylab="", asp=1) legend(x=c(67980, 68480), y=c(74710, 75180), pch=c(1:5), legend=levels(pcbs.o))