y_pred_bag = bag_clf.predict(X_test) y_pred_gbdt = gbdt_clf.predict(X_test) print(accuracy_score(y_test, y_pred_rf)) print(accuracy_score(y_test, y_pred_bag)) print(accuracy_score(y_test,y_pred_gbdt)) # Feature Importance iris = load_iris() rnd_clf = RandomForestClassifier(n...
A. 对每一颗决策树,选择相应的袋外数据(out of bag,OOB)计算袋外数据误差,记为errOOB1. B. 随机对袋外数据OOB所有样本的特征X加入噪声干扰(可以随机改变样本在特征X处的值),再次计算袋外数据误差,记为errOOB2。 C. 假设森林中有N棵树,则特征X的重要性 importance=∑(errOOB2-errOOB1)/N。这个数...
Compute out-of-bag cross-validated feature contributions to visualize model structures of randomForest models.Soren Havelund Welling
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