tripack (version 1.0-1)

voronoi.mosaic: Create a Voronoi mosaic

Description

This function creates a Voronoi mosaic.

It creates first a Delaunay triangulation, determines the circumcircle centers of its triangles, and connects these points according to the neighbourhood relations between the triangles.

Usage

voronoi.mosaic(x,y=NULL,duplicate="error")

Arguments

x

vector containing x coordinates of the data. If y is missing x should contain two elements $x and $y.

y

vector containing y coordinates of the data.

duplicate

flag indicating how to handle duplicate elements. Possible values are: "error" -- default, "strip" -- remove all duplicate points, "remove" -- leave one point of duplicate points.

Value

• An object of class voronoi.

See Also

voronoi,voronoi.mosaic, print.voronoi, plot.voronoi

Examples

# example from TRIPACK:
data(tritest)
tritest.vm<-voronoi.mosaic(tritest$x,tritest$y)
tritest.vm
# use a part of the quakes data set:
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")
quakes.vm