subset function

Subset layers in a Raster* object

Extract a set of layers from a RasterStack or RasterBrick object.

## S4 method for signature 'Raster'
subset(x, subset, drop=TRUE, filename='', ...)

## S4 method for signature 'RasterStack'
subset(x, subset, drop=TRUE, filename='', ...)

Arguments

• x: RasterBrick or RasterStack object
• subset: integer or character. Should indicate the layers (represented as integer or by their name)
• drop: If TRUE, a selection of a single layer will be returned as a RasterLayer
• filename: character. Output filename (optional)
• ...: additional arguments as for writeRaster

Returns

Raster* object

See Also

dropLayer

Examples

s <- stack(system.file("external/rlogo.grd", package="raster"))
sel <- subset(s, 2:3)

# Note that this is equivalent to
sel2 <- s[[2:3]]

# and in this particular case:
sel3 <- dropLayer(s, 1)

nlayers(s)
nlayers(sel)

# effect of 'drop=FALSE' when selecting a single layer
sel <- subset(s, 2)
class(sel)
sel <- subset(s, 2, drop=FALSE)
class(sel)