def test_dependent_variable_properties_as_members_for_continous_node():
"""
Tests that node prints the std and mean when contonuous column supplied
"""
data = np.array([1.3, 23.0, 3.0, 3.0, 12.4])
continuous_dp = CHAID.ContinuousColumn(data)
node = CHAID.Node(dep_v=continuous_dp)
assert node.members == {'mean': data.mean(), 's.t.d': data.std()}
def setUp(self):
invalid_split = CHAID.Split(None, None, 0, 1, 0)
self.tree = CHAID.Tree.from_numpy(np.array([[1]]), np.array([1]))
self.tree._tree_store = [
CHAID.Node(node_id=0,
split=CHAID.Split('a', [[1], [2]], 1, 0.2, 2)),
CHAID.Node(node_id=1, split=invalid_split, choices=[1], parent=0),
CHAID.Node(node_id=2,
split=CHAID.Split('c', [[3]], 1, 0.2, 2),
choices=[2],
parent=0)
]
self.last_node = CHAID.Node(node_id=3,
split=invalid_split,
choices=[3],
parent=2)
self.tree._tree_store.append(self.last_node)
def test_node_should_have_a_score():
"""
Tests that node uses the split score and is called 'score'
"""
data = np.array([1.3, 23.0, 3.0, 3.0, 12.4])
continuous_dp = CHAID.ContinuousColumn(data)
split = CHAID.Split("a", [], 2, 3, 4)
node = CHAID.Node(dep_v=continuous_dp, split=split)
assert node.score == 2