我帮顶啊 。。。

I don't quite get your question. But are you looking for something like this?

proc glm data=data;               
        MODEL t1=        x1 x2 x3 x4 x1*x2 x1*x3 x1*x4 x2*x3 x2*x4 x3*x4 x1*x1 x2*x2 x3*x3 x4*x4/        ;       
RUN;

关注中，顶起！

try this model
data hw521;
input  x1 x2 x3 x4 x5 y1;
x12=x1*x1; x1x2=x1*x2; x1x3=x1*x3; x1x4=x1*x4;
x22=x2*x2; x2x3=x2*x3; x2x4=x2*x4;
x32=x3*x3; x3x4=x3*x4; x52=x5*x5;
datalines;
1 1 1 1 1 86.3
...
;
proc glm;
class x1 x2 x3 x4 x5;
input  x1 x2 x3 x4 x5 y1;
model y1=x1 x2 x3 x4 x5 x12 x1x2 x1x3 x1x4 x22 x2x3 x2x4 x32 x3x4 x52;
run;

update
data hw521;
input  x1 x2 x3 x4 y1;
x12=x1*x1; x1x2=x1*x2; x1x3=x1*x3; x1x4=x1*x4;
x22=x2*x2; x2x3=x2*x3; x2x4=x2*x4;
x32=x3*x3; x3x4=x3*x4;
x42=x4*x4;
datalines;
1 1 1 1 86.3
...
;
proc glm;
class x1 x2 x3 x4;
model y1=x1 x2 x3 x4 x12 x1x2 x1x3 x1x4 x22 x2x3 x2x4 x32 x3x4 x42;
run;

11# lqyrendajinji
可是，我从来没用过SAS啊，楼上可不可以教教我，帮我弄一下呢？

楼上已经写出来了，还要怎么教？就是出了结果你都不知道要取哪行那列数据

give me your data

13# xiaosanmao
出了数据我肯定就会分析的，只是我不会操作SAS啊，不知道那个程序怎么用。

14# lqyrendajinji
你好，怎么给你数据呢？在帖子的附件里有，可以下载不需要流量费，或者你加我QQ496788454