Mask a 3D cube by a spatial label map

Sets pixels outside selected regions to zero or NA across all bands.

Usage

mask_cube(cube, labels, mode = c("zero", "na"))

Arguments

cube

3-D numeric array with dimensions [H, W, B].

labels

2-D matrix [H, W]; values greater than zero are kept.

mode

"zero" or "na" — how to fill masked pixels.

Value

Masked cube with same dimensions as input.