tripack (version 1.3-9.2)

plot.voronoi: Plot a voronoi object

Description

Plots the mosaic "x".

Dashed lines are used for outer tiles of the mosaic.

Usage

# S3 method for voronoi
plot(x,add=FALSE,
                           xlim=c(min(x$tri$x)-
                             0.1*diff(range(x$tri$x)),
                             max(x$tri$x)+
                             0.1*diff(range(x$tri$x))),
                           ylim=c(min(x$tri$y)-
                             0.1*diff(range(x$tri$y)),
                             max(x$tri$y)+
                             0.1*diff(range(x$tri$y))),
                           all=FALSE,
                           do.points=TRUE,
                           main="Voronoi mosaic",
                           sub=deparse(substitute(x)),
                           isometric=FALSE,
                           ...)

Value

None

Author

A. Gebhardt

Arguments

x

object of class "voronoi"

add

logical, if TRUE, add to a current plot.

xlim

x plot ranges, by default modified to hide dummy points outside of the plot

ylim

y plot ranges, by default modified to hide dummy points outside of the plot

all

show all (including dummy points in the plot

do.points

logical, indicates if points should be plotted.

main

plot title

sub

plot subtitle

isometric

generate an isometric plot (default FALSE)

...

additional plot parameters

References

R. J. Renka (1996). Algorithm 751: TRIPACK: a constrained two-dimensional Delaunay triangulation package. ACM Transactions on Mathematical Software. 22, 1-8.

See Also

voronoi, print.voronoi, summary.voronoi

Examples

# plot a random mosaic
plot(voronoi.mosaic(runif(100),runif(100),duplicate="remove"))
# use isometric=TRUE and all=TRUE to see the complete mosaic
# including extreme outlier points:
plot(voronoi.mosaic(runif(100),runif(100),duplicate="remove"),
     all=TRUE, isometric=TRUE)
# use a part of the quakes data set:
data(quakes)
quakes.part<-quakes[(quakes[,1]<=-17 & quakes[,1]>=-19.0 &
                     quakes[,2]<=182.0 & quakes[,2]>=180.0),]
quakes.vm<-voronoi.mosaic(quakes.part$lon, quakes.part$lat,
                          duplicate="remove")
plot(quakes.vm, isometric=TRUE)
# use the whole quakes data set 
# (will not work with standard memory settings, hence commented out here)
#plot(voronoi.mosaic(quakes$lon, quakes$lat, duplicate="remove"), isometric=TRUE)