def test_classless(self):
classless = Table(Domain(self.zoo.domain.attributes), self.zoo[:,
0:-1])
scorers = [score.Gini(), score.InfoGain(), score.GainRatio()]
for scorer in scorers:
with self.assertRaises(ValueError):
scorer(0, classless)
def test_wrong_class_type(self):
scorers = [score.Gini(), score.InfoGain(), score.GainRatio()]
for scorer in scorers:
with self.assertRaises(ValueError):
scorer(0, self.housing)
with self.assertRaises(ValueError):
score.Chi2(2, self.housing)
with self.assertRaises(ValueError):
score.ANOVA(2, self.housing)
score.UnivariateLinearRegression(2, self.housing)
def test_gain_ratio(self):
scorer = score.GainRatio()
correct = [0.80351, 1.00000, 0.84754, 1.00000, 0.59376]
np.testing.assert_almost_equal([scorer(a, self.zoo) for a in range(5)],
correct,
decimal=5)
