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【机器学习理论】True Positive, True Negative, False Positive, False Negative概念
2022-06-11 10:13:00 【小明2766】
True Positive, True Negative, False Positive, False Negative概念1

- True positive-——-预测正确,且为正面;
- True negative——-预测正确,且为负面;
- False positive——-预测错误,预测为正面;(错误地预测为正面)
- False negative——预测错误,预测为负面;(错误地预测为负面)
前面的True/False表示“对了没”,后面的positive/negative表示“预测的值”。
Precision(准确率)
针对预测为1(predicted值为1的行),预测正确的比率;
True positive / (True positive + False positive)
Recall(召回率)
针对实际为1(actual值为1的列),预测正确的比率;
True positive / (True positive + False negative)
参考文献
https://blog.csdn.net/Houchaoqun_XMU/article/details/78865985 ︎
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