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Bootstrap Aggregating.md

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即Bagging 只有一个弱学习器 ![[Pasted image 20240531220707.png]]

Bootstrap Sampling

![[Pasted image 20240531220730.png]]

Bagging 算法

![[Pasted image 20240531220819.png]] ![[Pasted image 20240531220829.png]]

结果

![[Pasted image 20240531220911.png]] 但在KNN上没有效果: ![[Pasted image 20240531220946.png]] Bagging在学习器不稳定时有用,指有部分差异的训练集训练产生的预测器大不相同 ![[Pasted image 20240531221008.png]]

随机森林[[Random Forest]]