categoricalInformationValue 

对于每个类别计算 (P(tag = 1) - P(tag = 0))(log(P(tag = 1)) - log(P(tag = 0)))

categoricalInformationValue(category1, category2, ..., tag)

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。

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