The column and row offset from the top-left cell of the parent grid to
the top-left cell of the child grid. Both grids must have the same
resolution and share a lattice. The offset may be negative or exceed
the parent dimension: alignment is not containment.
Usage
grid_offset(
dimension,
extent = NULL,
dimension2,
extent2 = NULL,
tol = lattice_tol()
)
Arguments
- dimension
integer ncol, nrow
- extent
numeric extent xmin,xmax,ymin,ymax
- dimension2
dimension of the second grid (ncol, nrow)
- extent2
extent of the second grid (xmin, xmax, ymin, ymax),
NULL for unit cell space
- tol
relative tolerance for whole-number tests
Value
named integer vector c(col = , row = ), 0-based
Examples
## child starts 2 cells in and 3 cells down
grid_offset(c(10L, 10L), c(0, 10, 0, 10), c(5L, 5L), c(2, 7, 2, 7))
#> col row
#> 2 3