本文整理汇总了Python中sklearn.ensemble.BaggingClassifier.predict_log_proba方法的典型用法代码示例。如果您正苦于以下问题：Python BaggingClassifier.predict_log_proba方法的具体用法？Python BaggingClassifier.predict_log_proba怎么用？Python BaggingClassifier.predict_log_proba使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sklearn.ensemble.BaggingClassifier的用法示例。
在下文中一共展示了BaggingClassifier.predict_log_proba方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_bagging_classifier_with_missing_inputs
# 需要导入模块: from sklearn.ensemble import BaggingClassifier [as 别名]
# 或者: from sklearn.ensemble.BaggingClassifier import predict_log_proba [as 别名]
def test_bagging_classifier_with_missing_inputs():
# Check that BaggingClassifier can accept X with missing/infinite data
X = np.array([
[1, 3, 5],
[2, None, 6],
[2, np.nan, 6],
[2, np.inf, 6],
[2, np.NINF, 6],
])
y = np.array([3, 6, 6, 6, 6])
classifier = DecisionTreeClassifier()
pipeline = make_pipeline(
FunctionTransformer(replace, validate=False),
classifier
)
pipeline.fit(X, y).predict(X)
bagging_classifier = BaggingClassifier(pipeline)
bagging_classifier.fit(X, y)
y_hat = bagging_classifier.predict(X)
assert_equal(y.shape, y_hat.shape)
bagging_classifier.predict_log_proba(X)
bagging_classifier.predict_proba(X)
# Verify that exceptions can be raised by wrapper classifier
classifier = DecisionTreeClassifier()
pipeline = make_pipeline(classifier)
assert_raises(ValueError, pipeline.fit, X, y)
bagging_classifier = BaggingClassifier(pipeline)
assert_raises(ValueError, bagging_classifier.fit, X, y)示例2: test_probability
# 需要导入模块: from sklearn.ensemble import BaggingClassifier [as 别名]
# 或者: from sklearn.ensemble.BaggingClassifier import predict_log_proba [as 别名]
def test_probability():
# Predict probabilities.
rng = check_random_state(0)
X_train, X_test, y_train, y_test = train_test_split(iris.data,
iris.target,
random_state=rng)
with np.errstate(divide="ignore", invalid="ignore"):
# Normal case
ensemble = BaggingClassifier(base_estimator=DecisionTreeClassifier(),
random_state=rng).fit(X_train, y_train)
assert_array_almost_equal(np.sum(ensemble.predict_proba(X_test),
axis=1),
np.ones(len(X_test)))
assert_array_almost_equal(ensemble.predict_proba(X_test),
np.exp(ensemble.predict_log_proba(X_test)))
# Degenerate case, where some classes are missing
ensemble = BaggingClassifier(base_estimator=LogisticRegression(),
random_state=rng,
max_samples=5).fit(X_train, y_train)
assert_array_almost_equal(np.sum(ensemble.predict_proba(X_test),
axis=1),
np.ones(len(X_test)))
assert_array_almost_equal(ensemble.predict_proba(X_test),
np.exp(ensemble.predict_log_proba(X_test)))