def test_should_update_with_one_point_work_properly(self) -> None:
point = IdealPoint(3)
vector = [2.2, -1.5, 3.5]
point.update(vector)
self.assertEqual(vector, point.point)
def test_should_update_with_three_solutions_work_properly(self) -> None:
point = IdealPoint(3)
point.update([3.0, 1.0, 2.0])
point.update([0.2, 4.0, 5.5])
point.update([5.0, 6.0, 1.5])
self.assertEqual([0.2, 1.0, 1.5], point.point)
def test_should_update_with_two_solutions_work_properly(self) -> None:
point = IdealPoint(2)
vector1 = [0.0, 1.0]
vector2 = [1.0, 0.0]
point.update(vector1)
point.update(vector2)
self.assertEqual([0.0, 0.0], point.point)
class Tschebycheff(AggregativeFunction):
def __init__(self, dimension: int):
self.ideal_point = IdealPoint(dimension)
def compute(self, vector: [], weight_vector: []) -> float:
max_fun = -1.0e+30
for i in range(len(vector)):
diff = abs(vector[i] - self.ideal_point.point[i])
if weight_vector[i] == 0:
feval = 0.0001 * diff
else:
feval = diff * weight_vector[i]
if feval > max_fun:
max_fun = feval
return max_fun
def update(self, vector: []) -> None:
self.ideal_point.update(vector)