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决策树 | 少年歌行 #3

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lyb92nlf opened this issue Nov 13, 2021 · 0 comments
Open

决策树 | 少年歌行 #3

lyb92nlf opened this issue Nov 13, 2021 · 0 comments

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@lyb92nlf
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https://lyb92nlf.github.io/2021/11/13/Chapter04%E5%86%B3%E7%AD%96%E6%A0%91/

基本流程决策树是基于树结构来进行决策的,例如在西瓜问题中,对新样本的分类可看作对“当前样本属于正类吗”这个问题的“决策”过程。 决策树学习的目的是为了产生一颗泛化能力强,即处理未见示例能力强的决策树。 其基本算法如下图所示 注:在决策树基本算法中,有三种情形导致递归返回 当前结点包含的样本全属于同一类别,无需划分 当前属性集为空,或是所有样本在所有属性上取值相同,无法划分 当前结点包含的

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