leglabs makes character strings from the same break points. The plot.polylist() function may be used as a generic S3 method.

leglabs(vec, under="under", over="over", between="-", reverse=FALSE)

Arguments

vec

vector of break values

under

character value for under

over

character value for over

between

character value for between

reverse

flag to reverse order of values, you will also need to reorder colours, see example

See also

Examples

mappolys <- readShapeSpatial(system.file("shapes/columbus.shp", package="maptools")[1], ID="NEIGNO")
#> Warning: readShapeSpatial is deprecated; use rgdal::readOGR or sf::st_read
#> Warning: readShapePoly is deprecated; use rgdal::readOGR or sf::st_read
brks <- round(quantile(mappolys$CRIME, probs=seq(0,1,0.2)), digits=2) colours <- c("salmon1", "salmon2", "red3", "brown", "black") plot(mappolys, col=colours[findInterval(mappolys$CRIME, brks, all.inside=TRUE)])
legend(x=c(5.8, 7.1), y=c(13, 14.5), legend=leglabs(brks), fill=colours, bty="n")
title(main=paste("Columbus OH: residential burglaries and vehicle", "thefts per thousand households, 1980", sep="\n"))
#legend with reversed order plot(mappolys, col=colours[findInterval(mappolys$CRIME, brks, all.inside=TRUE)])
legend(x=c(5.8, 7.1), y=c(13, 14.5), legend=leglabs(brks, reverse = TRUE), fill=rev(colours), bty="n")
title(main=paste("Columbus OH: residential burglaries and vehicle", "thefts per thousand households, 1980 (reversed legend)", sep="\n"))