greymodel

代码说明：

  灰色预测模型在Matlab的语言编程(基于GM（1，1）模型)自己编的，很简单。就是为了当时处理数据方便。只是预测下一个数据，如果想得到更多的预测数据，可以在添加。(Gray prediction model in the Matlab programming language (based on GM (1,1) model) own, and very simple. At that time, in order to deal with data that is convenient. Only the next prediction data, if the prediction would like to receive more data, you can add.)