which.tile {deldir} | R Documentation |
Finds the Dirchlet/Voronoi tile of a tessellation produced by deldir that contains a given point.
which.tile(x, y, tl)
x |
The |
y |
The |
tl |
A tile list, as produced by the function |
Just minimises the distance from the point in question to the points of the pattern determining the tiles.
An integer equal to the index of the tile in which the given point lies.
Rolf Turner r.turner@auckland.ac.nz
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")