positive integer giving the number of items to choose.
...
Additional arguments: na.rm, extent, and cells. If TRUE NA values are removed from random sample
extent
Extent. To limit regular sampling to the area within that box
cells
Logical. Also return sampled cell numbers (if asRaster==FALSE)
asRaster
Logical. If TRUE, a rasterLayer is returned, rather then the sampled values
corners
Logical. If TRUE, the extreme corner cells are always included. This makes for rather irregular sampling when n is small; but it can be useful when asRaster=TRUE, to maintain the same extent as the input RasterLayer
Value
A vector, matrix (if cells=TRUE; or for a multi-layered object), or RasterLayer (if asRaster=TRUE)
Details
With na.rm=TRUE, the returned sample may be smaller than requested