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zhuohoudeputao avatar zhuohoudeputao commented on May 4, 2024

我看到IREP* 算法中在终止条件部分使用到了MDL最小描述长度,但是在西瓜书中好像没有提到,是有意为之吗?如果可以能深入解释一下这部分内容吗?
另外,IREP*中是将性能指标改成了(p-n)/(p+n), 是在IREP的实现中使用了(p+(N-n))/(P+N)。

from pumpkin-book.

archwalker avatar archwalker commented on May 4, 2024

我看到IREP* 算法中在终止条件部分使用到了MDL最小描述长度,但是在西瓜书中好像没有提到,是有意为之吗?如果可以能深入解释一下这部分内容吗?
另外,IREP*中是将性能指标改成了(p-n)/(p+n), 是在IREP的实现中使用了(p+(N-n))/(P+N)。

你好,按照西瓜书p355页对IREP*算法的描述,其性能指标为(p+(N-n))/(P+N)
MDL可以参见相关的文章 https://sci2s.ugr.es/keel/pdf/algorithm/congreso/ml-95-ripper.pdf

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