create an Hexagonal grid

Dear Gianni,

a good reference is the book "Applied Spatia lData Analysis with R", where there is an example in the Chapter "6.4 Hexagonal Grids" on page 137. Try this example using the test data set "meuse":

library(sp)
data(meuse.grid)
HexPts <- spsample(meuse.grid, type = "hexagonal", cellsize = 200)
spplot(meuse.grid["dist"], sp.layout = list("sp.points", HexPts, col = 1))
HexPols <- HexPoints2SpatialPolygons(HexPts)
df <- as.data.frame(meuse.grid)[overlay(meuse.grid, HexPts), ]
HexPolsDf<-SpatialPolygonsDataFrame(HexPols, df, match.ID = FALSE)
spplot(HexPolsDf["dist"])

More details in the above mentioned (very helpful) book. According to the book, there are no classes for hexagonal grids but some useful funtions to generate and plot them.

Good luck!

Nils

Gesendet: Mittwoch, 15. September 2010 17:29
Bis: r-sig-geo at stat.math.ethz.ch
Betreff: [R-sig-Geo] create an Hexagonal grid

Dear reseacher,

is there a way to create an Hexagonal grid with R?

thanks
Gianni

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