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one fable-low hijack cell

pair precision / recall envelope zh_huo ordering AB effort low
Chinese '或' (huò, or) framing — '{X}或{Y}?'
verdictpicked recall (second-offered)  ·  classifierB · tiernone

response (200 chars)

# Recall 与 Precision(召回率与精确率)

这是机器学习/信息检索中两个核心评估指标。

## 基本定义

基于混淆矩阵:

|  | 预测为正 | 预测为负 |
|---|---|---|
| **实际为正** | TP(真正例) | FN(假负例) |
| **实际为负** | FP(假正例) | TN(真负例) |

**Precision(精确率/查准率)**
$$Pre

neighbors

ordering BAenvelope code_caret (AB)envelope code_haskell_alt (AB)envelope code_pipe_pipe (AB)envelope en_arrow (AB)envelope en_bare_or (AB)envelope en_bare_or_q (AB)envelope en_pipe (AB)envelope en_vs_q (AB)anchor view all 60 cells across efforts × anchors