import numpy as np
from typing import Tuple
from desdeo_tools.scalarization import SimpleASF
[docs]def distance_to_reference_point(obj: np.ndarray, reference_point: np.ndarray) -> Tuple:
"""Computes the closest solution to a reference point using achievement scalarizing function.
Args:
obj (np.ndarray): Array of the solutions. Should be 2d-array.
reference_point (np.ndarray): The reference point array. Should be one dimensional array.
Returns:
Tuple: Returns a tuple containing the closest solution to a reference point and the index of it in obj.
"""
asf = SimpleASF(np.ones_like(obj))
res = asf(obj, reference_point=reference_point)
return np.min(res), np.argmin(res)
