Return the index of the cell nearest each value, or -1 outside the cells.
Each cell reaches halfway to its neighbours. The end cells reach the
same distance beyond their centres. With a single cell, every finite
value is inside it.
- Parameters:
coords (ndarray) – Cell centres along one axis, ascending or descending.
values (ndarray) – Positions to look up.
- Returns:
Index into coords for each value.
- Return type:
ndarray