交叉验证

交叉验证写的不错的一些文章

https://en.wikipedia.org/wiki/Cross-validation_(statistics)

http://scikit-learn.org/stable/modules/cross_validation.html

https://www.cnblogs.com/sddai/p/5696834.html

http://www.cnblogs.com/pinard/p/5992719.html

https://www.zhihu.com/question/23561944

https://www.zhihu.com/question/23561944

http://blog.sciencenet.cn/blog-397960-666113.html

http://blog.sina.com.cn/s/blog_7103b28a0102w70h.html

http://blog.csdn.net/suibianshen2012/article/details/52806321