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Classfication, 分类的目的就是用少量的信息来描述某个事件,比如说苹果是属于水果,就不用讲苹果是一种果实可以吃的植物:)

http://onlamp.com/pub/a/python/2006/02/09/ai_decision_trees.html?page=2

In other words, you are trying to find the attribute that best reduces the amount of information you need to classify your data.

如何给一堆事物分类,关键在于找到一个可以用最少量的语言来描述某个含消息最多的类

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