gm(1,1)模型算法实现

def gm11(x,n):#n是指预测的数值，例如前面2011,2012,2013,2014你能够用4来预测2015 x1 = x.cumsum() z1 = (x1[:len(x1) - 1] + x1[1:])/2.0#紧邻均值 z1 = z1.reshape((len(z1),1)) B = np.append(-z1,np.ones_like(z1),ax

>>阅读原文<<