Slice out a 3D subarray (or 2d matrix) from a 3D image array
imslice(x, slice, slicedim = "z", drop = TRUE)
An im3d object
Indices defining the slices to keep
Character vector or integer defining axis from which slices will be removed.
Whether singleton dimensions will be dropped (default: TRUE) converting 3D array to 2d matrix.
Note the sample locations stored in the x,y,z attributes will be updated appropriately. FIXME: Should we also update bounding box?