Add Stipples to an Existing Plot
Add stipples to an existing plot.
addStipples (polys, xlim=NULL, ylim=NULL, polyProps=NULL, side=1, density=1, distance=4, ...)
polys |
PolySet that provides the stipple boundaries (required). |
xlim |
range of X-coordinates. |
ylim |
range of Y-coordinates. |
polyProps |
PolyData specifying which polygons to stipple
and their properties. |
side |
one of |
density |
density of points, relative to the default. |
distance |
distance to offset points, measured as a percentage of
the absolute difference in |
... |
This function locates stipples based on the PolySet
polys and does not stipple degenerate lines.
PolyData consisting of the PolyProps used to create the plot.
Nicholas M. Boers, Associate Professor – Computer Science
MacEwan University, Edmonton AB
Last modified Rd: 2013-04-10
local(envir=.PBSmapEnv,expr={
oldpar = par(no.readonly=TRUE)
#--- load the data (if using R)
if (!is.null(version$language) && (version$language=="R"))
data(nepacLL,envir=.PBSmapEnv)
#--- plot a map
plotMap(nepacLL,xlim=c(-128.66,-122.83),ylim=c(48.00,51.16))
#--- add stippling
addStipples(nepacLL,col="purple",pch=20,cex=0.25,distance=2)
par(oldpar)
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