def test_SAX_mechanics_normalize_no_std(self):
d = __SAX__()
vals = [10] * STRESS_VALUE_COUNT
with self.assertRaises(SaxConstrainsException,
msg="No standard deviation not caught"):
d.normalize(vals)
def test_SAX_mechanics_PAA_identical(self):
d = __SAX__(points_amount=3)
vals = reduce(lambda x, y: x + y, [[i, i, i] for i in range(100)])
expected = list(range(100))
real, _ = d.to_paa(vals)
res, msg = assert_almost_equality({1: expected}, {1: list(real)})
self.assertTrue(res, msg)
def test_SAX_mechanics_normalize_std(self):
d = __SAX__()
vals = [i for i in range(100)]
mean = 49.5
std = 28.86607005
normalized_vals = [(i - mean) / std for i in vals]
real_vals = d.normalize(vals)
res, msg = assert_almost_equality({1: normalized_vals}, {1: real_vals})
self.assertTrue(res, msg)