def test_new_columns_constructor():
"""
Test the new tree constructor that takes CHAID Columns as parameters
"""
orientation = np.array([0,0,1,1,0,0,1,1,0,0,1,2,2,2,2,2,2,2,2,1])
age = np.array([0,1,1,0,2,2,2,2,1,1,1,0,0,0,0,0,0,0,0,0])
income = np.array([0,0,1,1,2,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0])
metadata = {0: '0-5', 1: '6-10', 2: '11-15'}
cols = [
CHAID.OrdinalColumn(orientation, name="orientation", metadata=metadata),
CHAID.OrdinalColumn(age, name="age", metadata=metadata),
]
tree = CHAID.Tree(cols, CHAID.NominalColumn(income), {'min_child_node_size': 1})
assert tree.tree_store[0].split.groupings == "[['0-5'], ['6-10', '11-15']]"
def setUp(self):
""" Setup for grouping tests """
arr = np.array(
[1.0, 2.0, 3.0, 3.0, 3.0, 3.0, 4.0, 5.0, 10.0, None],
dtype=object
)
self.col = CHAID.OrdinalColumn(arr)
def test_column_stores_weights():
"""
Tests that the columns store the weights when they are passed
"""
arr = np.array([1.0, 2.0, 3.0])
wt = np.array([2.0, 1.0, 0.25])
nominal = CHAID.NominalColumn(arr, weights=wt)
ordinal = CHAID.OrdinalColumn(arr, weights=wt)
continuous = CHAID.ContinuousColumn(arr, weights=wt)
assert (nominal.weights == wt).all()
assert (ordinal.weights == wt).all()
assert (continuous.weights == wt).all()
def setUp(self):
""" Setup for grouping tests """
arr = np.array([1.0, 2.0, nan, 3.0, 3.0, nan, 3.0, 3.0, nan, 4.0, 5.0, 10.0])
self.col = CHAID.OrdinalColumn(arr)
def setUp(self):
""" Setup for copy tests"""
arr = np.array([1, 2, 3, 3, 3, 3])
self.orig = CHAID.OrdinalColumn(arr)
self.copy = self.orig.deep_copy()