cellsFromExtent function

Cells from extent, and vice versa

cellsFromExtent returns the cell numbers for a Raster* object that are within a specfied extent (rectangular area), supply an object of class Extent, or another Raster* object.

extentFromCells returns an Extent object from a Raster* object and cell numbers. All cells are within the returned Extent.

cellsFromExtent(object, extent, expand=FALSE)
extentFromCells(object, cells)

Arguments

• object: A Raster* object

• extent: An object of class Extent (which you can create with newExtent(), or another Raster* object )

• expand: Logical. If TRUE, NA is returned for (virtual) cells implied by bndbox, that are outside the RasterLayer (object). If FALSE, only cell numbers for the area where object and bndbox

  overlap are returned (see intersect )

• cells: numeric. A vector of cell numbers

Returns

a vector of cell numbers

See Also

extent, cellFromXY

Examples

r <- raster()
bb <- extent(-5, 5, -5, 5)
cells <- cellsFromExtent(r, bb)
r <- crop(r, bb)
values(r) <- cells

e <- extentFromCells(r, 50:55)