plot.nb {spdep} | R Documentation |
A function to plot a neighbours list given point coordinates to represent the region in two dimensions; plot.listw
is a wrapper that passes its neighbours component to plot.nb
.
plot.nb(x, coords, col="black", points=TRUE, add=FALSE, arrows=FALSE, length=0.1, ...) plot.listw(x, coords, col="black", points=TRUE, add=FALSE, arrows=FALSE, length=0.1, ...)
x |
an object of class nb or (for plot.listw ) class listw |
coords |
matrix of region point coordinates |
col |
plotting colour |
points |
(logical) add points to plot |
add |
(logical) add to existing plot |
arrows |
(logical) draw arrowheads for asymmetric neighbours |
length |
length in plot inches of arrow heads drawn for asymmetric neighbours lists |
... |
further graphical parameters as in par(..) |
Roger Bivand Roger.Bivand@nhh.no
data(columbus) plot(col.gal.nb, coords) title(main="GAL order 1 links with first nearest neighbours in red") col.knn <- knearneigh(coords, k=1) plot(knn2nb(col.knn), coords, add=TRUE, col="red", length=0.08)