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周志华机器学习
2022-08-04 05:29:00 【视觉菜鸟Leonardo】
1.
真正例率（TPR）、假正例率（FPR）与查准率（P）、查全率（R）之间的联系：
查全率: 真实正例被预测为正例的比例
真正例率: 真实正例被预测为正例的比例
显然查全率与真正例率是相等的。
查准率:预测为正例的实例中真实正例的比例
假正例率: 真实反例被预测为正例的比例
2.损失函数其实就是算罚分，模型预测质量越差，罚分越多。
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