机器学习二分类问题模型效果度量方法

ref http://blog.csdn.net/ice110956/article/details/20288239 http://www.cnblogs.com/Allen-rg/p/5821949.html http://blog.csdn.net/taoyanqi8932/article/details/54409314 https://www.zhihu.com/question/306

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