V2EX true positive rate

True Positive Rate

释义 Definition

True Positive Rate(TPR):真正例率;在所有“实际为正”的样本中,被模型正确预测为正的比例。常用于二分类与医学检验、信息检索、机器学习评估中。也常被称为 Sensitivity(敏感度)Recall(召回率)
公式:TPR = TP / (TP + FN)

发音 Pronunciation (IPA)

/tru pztv ret/

例句 Examples

The test has a high true positive rate.
这项检测的真正例率很高。

To compare classifiers fairly, we reported the true positive rate at several false positive rate thresholds.
为了公平比较分类器,我们在多个假正例率阈值下报告了真正例率。

词源 Etymology

该短语由 true(真实的、正确的)+ positive(阳性/正类)+ rate(比率) 组成:

  • true positive 指“预测为正且实际也为正”的情况(真正例);
  • rate 表示“比例/发生率”。
    因此 true positive rate 就是“真正例所占的比例”,在统计学与信号检测理论中逐渐固定为指标术语。

相关词 Related Words

文学与著作 Literary Works

  • Pattern Recognition and Machine Learning(Christopher M. Bishop)
  • The Elements of Statistical Learning(Hastie, Tibshirani, Friedman)
  • An Introduction to Information Retrieval(Manning, Raghavan, Schütze)
  • Machine Learning: A Probabilistic Perspective(Kevin P. Murphy)
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