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12_决策树(Decision tree)
2022-07-26 22:37:00 【Acowardintheworld】
12_决策树(Decision tree)
在这一章,我们将学习另外一个大名鼎鼎的机器学习算法:决策树。决策树本身非常简单,背后并没有复杂的数学模型,
但使用好决策树也有很多技巧。我们将深入了解什么是熵模型,什么是基尼系数,怎样使用决策树解决分类问题,
怎样获得分类的概率,怎样用决策树解决回归问题,以及使用决策树的注意事项。 …
12-1 什么是决策树




12-2 信息熵




12-4 基尼系数



12-5 CART与决策树中的超参数



可以通过DT的官方文档查阅相关的参数
官方文档:https://scikit-learn.org/stable/modules/generated/sklearn.tree.DecisionTreeClassifier.html#sklearn.tree.DecisionTreeClassifier
12-6 决策树解决回归问题


12-7 决策树的局限性
- 对数据的划分只能是垂线或者平行线



- 对个别的数据敏感

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