raster (version 1.9-44)

expand: Expand

Description

Expand returns an Raster* object with a larger spatial extent. The output Raster object has the outer minimum and maximum coordinates of the input Raster and Extent arguments. Thus, all of the cells of the original raster are included. See crop if you (also) want to remove rows or columns.

Usage

expand(x, y, ...)

Arguments

x

RasterLayer object

y

Extent object, or any object that is or has an Extent object, or an object from which it can be extracted (such as sp objects). Alternatively, you can provide a vector of lenght 2 with the number indicating the amount of rows and columns that need to

...

Additional arguments as for writeRaster

Value

• RasterLayer or RasterBrick object

See Also

crop, merge

Examples

r <- raster(xmn=-150, xmx=-120, ymx=60, ymn=30, ncol=36, nrow=18)
r[] <- 1:ncell(r)
e <- extent(-180, 0, 0, 90)
re <- expand(r, e)

# expand with a number of rows and columns (at each side)
re2 <- expand(r, c(2,10))