deldir (version 0.1-16)

which.tile: Determine the tile containing a given point.

Description

Finds the Dirchlet/Voronoi tile of a tessellation produced by deldir that contains a given point.

Usage

which.tile(x, y, tl)

Arguments

x

The x coordinate of the point in question.

y

The y coordinate of the point in question.

tl

A tile list, as produced by the function tile.list() from a tessellation produced by deldir().

Value

An integer equal to the index of the tile in which the given point lies.

Details

Just minimises the distance from the point in question to the points of the pattern determining the tiles.

See Also

tile.list() deldir().

Examples

Run this code
# NOT RUN {
set.seed(42)
x   <- runif(20,0,100)
y   <- runif(20,0,100)
dxy <- deldir(x,y)
txy <- tile.list(dxy)
i   <- which.tile(30,50,txy) # The value of i here is 14.
plot(txy,showpoints=FALSE)
text(x,y,labels=1:length(txy),col="red")
points(30,50,pch=20,col="blue")
# }

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