分类精度评价指标

  

True Positive (TP)

False Positive (FP)

False Negative (FN)

True Negative TN

准确率(accuracy) = 预测对的/所有 = (TP+TN)/(TP+FN+FP+TN)
精确率(precision) = TP/(TP+FP) 
召回率(recall) = TP/(TP+FN) 

1. 查准率(precision)

正确率 = 提取出的正确信息条数 /  提取出的信息条数

2. 查全率(recall)

召回率 = 提取出的正确信息条数 /  样本中的信息条数   

https://www.zhihu.com/question/19645541

http://www.cnblogs.com/bluepoint2009/archive/2012/09/18/precision-recall-f_measures.html

http://blog.sciencenet.cn/blog-460603-785098.html

http://www.cnblogs.com/zhizhan/p/4870429.html

http://blog.sina.com.cn/s/blog_670ee7720102vjxg.html

http://bookshadow.com/weblog/2014/06/10/precision-recall-f-measure/

http://www.cnblogs.com/zhaokui/p/ml-metric.html