部分代码（内含3个例子，1分绝对划算）：
function yc0=GM1(x0,N)
%x0 is the original data ,
%N is the number you want to predict.
n=length(x0);
for i=1:n
x1(i)=sum(x0(1:i));
end
% for k=2:n % 紧邻均生成 z
% z(k)=0.5*x1(k)+0.5*x1(k-1);
2019-12-21 22:04:17
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