spsample: random points within a radius r from observed locations
Hi Gabriele Don't know of such a function, but the following should return 10 random locations per polygon in 'buffer' randompoints.list <- sapply(buffer at polygons, spsample, n = 10, type = 'random') randompoints <- do.call(rbind, randompoints.list) May be a start... Cheers, Rafael
On 27.10.15 09:37, Gabriele Cozzi wrote:
Dear list, I have a set of relocation data (call it pnts). What I want to do is to create, for each relocation of pnts, n alternative relocations within a radius r. My intuitive approach was to use of the spsample function in the sp package. buffer <- gBuffer(spgeom = pnts, width=r, byid=T) randompoints <- spsample(x=buffer, n=10, type="random", iter=10) The problem here is that spsample creates 10 random points over all Polygons in the buffer object and not for each Polygon within buffer. Is there a function that returns random locations by passing a SpatialPoints-class object to it and a radius r? Any help is appreciated. Gabriele
Rafael W?est rafael.wueest at gmail.com http://www.rowueest.net