说明：  非参数法估计ROC曲线下面积,本文将采用实例数据具体介绍如何利用简单实用的非参数法估计与比较ROC 曲线下面积
(Non-parametric method estimates the area under the ROC curve, this paper will use examples of specific data on how to make use of simple and practical introduction of the non-parametric estimation and comparison of ROC area under the curve)