def test_100_integers_update_variance(self):
test_set = list(range(0, 100))
online = OnlineVariance()
for number in test_set:
online.update(number)
self.assertEqual(online.variance, variance(test_set))
def test_100_floats_update_variance(self):
test_set = [i / 3 for i in range(0, 100)]
online = OnlineVariance()
for number in test_set:
online.update(number)
#note: this test will fail on the final the test_set if `places` > 12
self.assertAlmostEqual(online.variance, variance(test_set), places=12)
def test_two_update_variance(self):
test_sets = [[0, 2], [1, 1], [1, 2], [-1, 1], [10.5, 20]]
for test_set in test_sets:
online = OnlineVariance()
for number in test_set:
online.update(number)
self.assertEqual(online.variance, variance(test_set))
def test_two_update_variance(self):
batches = [[0, 2], [1, 1], [1, 2], [-1, 1], [10.5, 20]]
for batch in batches:
online = OnlineVariance()
for number in batch:
online.update(number)
self.assertEqual(online.variance, variance(batch))
def test_three_update_variance(self):
test_sets = [ [0, 2, 4], [1, 1, 1], [1,2,3], [-1,1,-1], [10.5,20,29.5] ]
for test_set in test_sets:
online = OnlineVariance()
for number in test_set:
online.update(number)
#note: this test will fail on the final the test_set if `places` > 15
self.assertAlmostEqual(online.variance, variance(test_set), places = 15)
def test_three_update_variance(self):
batches = [[0, 2, 4], [1, 1, 1], [1, 2, 3], [-1, 1, -1],
[10.5, 20, 29.5]]
for batch in batches:
online = OnlineVariance()
for number in batch:
online.update(number)
#note: this test will fail on the final the batch if `places` > 15
self.assertAlmostEqual(online.variance, variance(batch), places=15)
def test_one_update_variance_nan(self):
online = OnlineVariance()
online.update(1)
self.assertTrue(isnan(online.variance))