Split a spatial object (initially tested on SpatialPolygons) into quadrants.
Should the output be numbers from 1:4 (FALSE by default)
Returns a character vector of NE, SE, SW, NW corresponding to north-east, south-east quadrants respectively. If number_out is TRUE, returns numbers from 1:4, respectively.
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data(zones) sp_obj <- zones (quads <- quadrant(sp_obj)) plot(sp_obj, col = factor(quads)) points(rgeos::gCentroid(sp_obj), col = "white") # edge cases (e.g. when using rasters) lead to NAs sp_obj <- raster::rasterToPolygons(raster::raster(ncol = 3, nrow = 3)) (quads <- quadrant(sp_obj)) plot(sp_obj, col = factor(quads))
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