DataConversionWarning: A column-vector y was passed when a 1d array was expected. 问题解决 和 数据平衡问题

DataConversionWarning: A column-vector y was passed when a 1d array was expected. 问题解决 和 数据平衡问题

参考文章：

（1）DataConversionWarning: A column-vector y was passed when a 1d array was expected. 问题解决 和 数据平衡问题

（2）https://www.cnblogs.com/zhange000/p/10558169.html

（3）https://www.codeprj.com/blog/a11ad91.html

备忘一下。