Decision tree principle of machine learning

Decision tree – Information gain , Information gain ratio ,Geni Understanding of index

https://www.cnblogs.com/muzixi/p/6566803.html

One . CART

CART, Also known as classification regression tree , Is in ID3 Based on the optimization of the decision tree , Study CART Remember the following key points ：
（1）CART It can be a classification tree , It can be a classification tree ;
（2） When CART It's a classification tree , use GINI Value as the basis for node splitting ; When CART It's back to the tree , The minimum variance of the sample is used as the basis of node splitting ;
（3）CART It's a binary tree .

Reprint ：
https://www.cnblogs.com/yonghao/p/5135386.html

Two . ID3

https://blog.csdn.net/weixin_43216017/article/details/87474045

3、 ... and . C4.5

https://blog.csdn.net/zjsghww/article/details/51638126