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
________________________________________
Von: r-sig-geo-boun...@stat.math.ethz.ch
[r-sig-geo-boun...@stat.math.ethz.ch]" im Auftrag von "gianni
lavaredo [gianni.lavar...@gmail.com]
Gesendet: Mittwoch, 15. September 2010 17:29
Bis: r-sig-geo@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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