plot.voronoi: Plot a voronoi object

In tripack: Triangulation of Irregularly Spaced Data

Plot a voronoi object

Description

Plots the mosaic "x".

Dashed lines are used for outer tiles of the mosaic.

Usage

## S3 method for class '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,
                           ...)

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

Value

None

Author(s)

A. Gebhardt

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)

tripack documentation built on Oct. 21, 2024, 5:07 p.m.