tri.dellens: Compute the Delaunay segment lengths In tripack: Triangulation of Irregularly Spaced Data

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

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

Arguments

 `voronoi.obj` object of class `"voronoi"` `exceptions` a numerical vector `inverse` Logical

Value

A vector of Delaunay segment lengths.

S. J. Eglen

See Also

`voronoi.findrejectsites`, `voronoi.mosaic`,

Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12``` ```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") ```

tripack documentation built on May 29, 2017, 9:52 p.m.