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| def test_gini_impurity(): | |
| assert round(gini_impurity([1, 1, 1, 1, 1, 1, 1, 1]), 3) == 0 | |
| assert round(gini_impurity([1, 1, 1, 1, 1, 1, 1, 0]), 3) == 0.219 | |
| assert round(gini_impurity([1, 1, 1, 1, 1, 1, 0, 0]), 3) == 0.375 | |
| assert round(gini_impurity([1, 1, 1, 1, 1, 0, 0, 0]), 3) == 0.469 | |
| assert round(gini_impurity([1, 1, 1, 1, 0, 0, 0, 0]), 3) == 0.500 | |
| def test_gini_gain(): | |
| assert round(gini_gain([1, 1, 1, 1, 0, 0, 0, 0], [[1, 1, 1, 1], [0, 0, 0, 0]]), 3) == 0.5 |
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| + ------------+----------+--------+-----------------------------------------+--------+-----+-------+-------+-----------+---------+-------+----------+ | |
| | PassengerId | Survived | Pclass | Name | Sex | Age | SibSp | Parch | Ticket | Fare | Cabin | Embarked | | |
| + ------------+----------+--------+-----------------------------------------+--------+-----+-------+-------+-----------+---------+-------+----------| | |
| | 1 | 0 | 3 | Braund, Mr. Owen Harris | male | 22 | 1 | 0 | A/5 21171 | 7.25 | nan | S | | |
| | 2 | 1 | 1 | Cumings, Mrs. John Bradley (Florence... | female | 38 | 1 | 0 | PC 17599 | 71.2833 | C85 | C | | |
| | 3 | 1 | 3 | Heikkinen, Miss. Laina | female | 26 | 0 | 0 | STON/O2. | 7.925 | nan | S | | |
| | 4 | 1 | 1 | Futrelle, Mrs. Jacques Heath (Lily M... | female | 35 | 1 | 0 | 113803 | |
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