tripack (version 1.3-9.2)

tri.dellens: Compute the Delaunay segment lengths

Description

Return a vector of Delaunay segment lengths for the voronoi object. The Delaunay triangles connected to sites contained in exceptions vector are ignored (unless inverse is TRUE, when only those Delaunay triangles are accepted).

The exceptions vector is provided so that sites at the border of a region can be removed, as these tend to bias the distribution of Delaunay segment lengths. exceptions can be created by voronoi.findrejectsites.

Usage

tri.dellens(voronoi.obj, exceptions = NULL, inverse = FALSE)

Value

A vector of Delaunay segment lengths.

Author

S. J. Eglen

Arguments

voronoi.obj

object of class "voronoi"

exceptions

a numerical vector

inverse

Logical

See Also

voronoi.findrejectsites, voronoi.mosaic,

Examples

data(tritest)
tritest.vm <- voronoi.mosaic(tritest$x,tritest$y)

tritest.vm.rejects <- voronoi.findrejectsites(tritest.vm, 0,1, 0, 1)
trilens.all <- tri.dellens(tritest.vm)
trilens.acc <- tri.dellens(tritest.vm, tritest.vm.rejects)
trilens.rej <- tri.dellens(tritest.vm, tritest.vm.rejects, inverse=TRUE)

par(mfrow=c(3,1))
dotchart(trilens.all, main="all Delaunay segment lengths")
dotchart(trilens.acc, main="excluding border sites")
dotchart(trilens.rej, main="only border sites")