ClickHouse/docs/zh/sql-reference/aggregate-functions/reference/categoricalinformationvalue.md

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---
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sidebar_position: 250
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---
# categoricalInformationValue {#categoricalinformationvalue}
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对于每个类别计算 `(P(tag = 1) - P(tag = 0))(log(P(tag = 1)) - log(P(tag = 0)))`
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``` sql
categoricalInformationValue(category1, category2, ..., tag)
```
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结果指示离散(分类)要素如何使用 `[category1, category2, ...]` 有助于使用学习模型预测`tag`的值。