並前往https://estat.pixnet.net/blog/post/85523900-%E4%BA%A4%E5%8F%89%E9%A9%97%E8%AD%89%28cross-validation%29%E5%9C%A8%E9%86%AB%E5%AD%B8%E7%A0%94%E7%A9%B6%E4%B8%8A%E7%9A%84%E6%87%89%E7%94%A8
