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XGBoost训练: It is not easy to train all the trees at once. Instead, we use an additive strategy: fix what we have learned, and add one new tree at a ti 阅读全文
posted @ 2017-04-01 16:53
合唱团abc
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摘要:
Jaccard similarity coefficient(杰卡德相似系数): 两个集合A和B的交集元素在A,B的并集中所占的比例,称为两个集合的杰卡德相似系数 Correlation coefficient(相关系数): 准确率、召回、Fscore: Hinge Loss: $L(y(wx + 阅读全文
posted @ 2017-04-01 11:55
合唱团abc
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