GBDT 将子树结果当成lr输出

http://scikit-learn.org/stable/auto_examples/ensemble/plot_feature_transformation.html#example-ensemble-plot-feature-transformation-py

输出GBDT的子树结果用的是:apply函数

原文地址:https://www.cnblogs.com/zhangbojiangfeng/p/7299429.html