forecast可以进行预测

2# tlw1987
在一般线性回归里也能用forecast命令吗？好像不行的，输进去是红色额，那个命令在arima模型中可以。

of coz you can achieve that in proc reg. but you have to do sth in the dataset.

for example, you data have to looks like

t x
1 1
2 2
3 3
4 4
5 5
last last_x
last+1
.
.
.
last+24
proc reg data=dataset;
      model x = t;
      output out=output p=ptrend;
run;

in the dataset, you have to input the 24 t's value manually, and then leave x values empty.
   quit;

when x=0 it didn't work either?

model y=t;
output out=L3.reg   predicted=p ;

L3.reg   文件 中就有预测值