mathmatic

代码说明：

  毕业论文里用到的很多非常实用的统计学代码，找了很多天，里面还有自己写的代码的描述，分享给大家了，呵呵呵(Thesis in a lot of very practical use of statistical code, find a lot of days, which also has its own description of the code written to share for everybody, Ha ha ha)