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立即学习:https://edu.csdn.net/course/play/8652/178171?utm_source=blogtoedu
混淆矩阵 Confusion Matrix
TP: True Positive
TN: True Negative
FP: False Positive
FN: False Negative
正确率accuracy：(TP+TN)/(TP+TN+FP+FN)
错误率：1-(TP+TN)/(TP+TN+FP+FN)
灵敏性/真正率sensitivity/TPR：TP/(TP+FN)
特效性/真负率specificity：TN/(TN+FP)=1-FPR
精度/准确度precision：TP/(TP+FP)
错正率/假正率FPR：FP/(FP+TN)=1-特效性 | 
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