使用 Bagging 这种集成学习方式,大概有 37% 的样本是取不到的 (这些取不到的样本被称为 Out-of-Bag),因此可以将这部分没有取到的样本做测试/验证(不需要使用 train_test_split 划分出测试集)。 使用sklearn实现OOB 使用sklearn 实现 Bagging 集成学习,可以通过 oobscore属性来查看使用 Out-of-Bag 样本作为测...
bagging_clf2=BaggingClassifier(DecisionTreeClassifier(),n_estimators=5000,max_samples=100,bootstrap=True)bagging_clf2.fit(X_train,y_train)bagging_clf2.score(X_test,y_test) 结果如下 可以发现,准确度上升了一些,理论上,子模型数量越多,准确度越高 oob(Out-of-Bag) 可以发现,使用放回取样的时候,会...
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Each tree is built on a bootstrap sample of size approximately 2/3 of the training dataset. Bootstrap sampling is done with replacement, and the remaining 1/3 of the training set is used to compute the out-of-bag score. Thus, the out-of-bag calculation is done on training data only....
It partly is their awkwardness in social situations. Honestly, who really wants to make small talk at a party anyway? Give me an actual conversation — and this is where nerds shine, the result of having read actual books and newspapers. The fact that a guy has never heard... ...
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let the cat out of the bag v.泄露秘密 boom out 发出…隆隆的声音 boot out 踢开,驱逐,解雇 log out 注销 look out 面朝,朝外看;留神,提防;照料,照看;搜寻,找出 bow out 由...退出,从容引退 make out v.书写,填写,拼凑,进展,说明,设法应付,理解,辨认出 做,了解 ...
PGG extends the idea of leaf node purity by taking into account the rate of purity convergence and the depth at which it takes place. RTC is a comprehensive score which takes into account the confidence with which a tree makes both correct and incorrect out of bag classifications. Statistical...
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into (out of) thin air in (out of) tune iron out jury is still out keep an eye out kick out knock out knock the bottom out lash out lay out leave out let out let the cat out of the bag light out like a bat out of hell ...