请看helpl中，查找procedure varmax，有清楚说明。

大侠，能给个具体的例子吗？SAS网站还是有点confusing呢……谢谢了！

/*--------------------------------------------------------------
如下例子来自：SAS9.3-help
                    SAS Sample Library

        Name: varex04.sas
Description: Example program from SAS/ETS User's Guide,
              The VARMAX Procedure
       Title: Illustration of ODS Graphics
     Product: SAS/ETS Software
        Keys: Vector AutoRegressive Moving-Average
              processes with eXogenous regressors
        PROC: VARMAX
       Notes:

--------------------------------------------------------------*/

ods graphics on;

title "Illustration of ODS Graphics";
proc varmax data=sashelp.workers plot(unpack)=(residual model forecasts);
   id date interval=month;
   model electric masonry / dify=(1,12) noint p=1;
   output lead=12;
run;


title "Illustration of ODS Graphics";
proc varmax data=sashelp.workers plot(unpack)=(residual model forecasts);
   id date interval=month;
   model electric masonry / dify=(1,12) noint p=1;
   output back=12;
run;

多谢啦！大侠！这下都清楚了！