Exemplo n.º 1
0
def variance(xs):
    """assumes xs has at least two elements"""
    n = len(xs)
    deviations = de_mean(xs)
    return sum_of_squares(deviations) / (n - 1)
Exemplo n.º 2
0
def variance(x):
	'''assumes x has at least two elements'''
	n = len(x)
	deviations = de_mean(x)
	return sum_of_squares(deviations) / (n - 1)
Exemplo n.º 3
0
def variance(v):
    n = len(v)
    deviations = de_mean(v)
    return sum_of_squares(deviations) / (n - 1)
Exemplo n.º 4
0
def var(x):
    n = len(x)
    return sum_of_squares(de_mean(x))/(n-1)
Exemplo n.º 5
0
 def test_can_calculate_sum_of_squares(self):
     self.assertEqual(vectors.sum_of_squares([1, 2]), 5)