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¸÷λ´óϺ£ºÎÒÐèÒª×öÏÂÁÐÊý¾ÝµÄ¶àÔª·ÇÏßÐÔÄâºÏ£¬µ«Ä£·ÂÒ»¸ö³ÌÐòºÍÎÄÏ׵Ľá¹û²»Ò»Ö£¬Ï£Íû°ï½â¾öÒ»ÏÂÕâ¸öÎÊÌ⣨·Ö±ðÇóODÖµ¶Ôx1 x2 x3µÄ¶àÔªÏßÐԺͷÇÏßÐԻعéÄâºÏ£¬¸ø³ör2Öµ£©£¬Êý¾Ý£º
x1   x2  x3   OD
3.69    8.17    10.28    0.667
8.31    8.17    10.28    0.000
3.69    1.683   10.28    0.732
8.31    1.683   10.28    0.176
3.69    8.17    24.72    0.788
8.31    8.17    24.72    0.164
3.69    1.683   24.72    0.760
8.31    1.683   24.72    0.000
2       1.25    17.5     1.009
10      1.25    17.5     0.000
6       5       17.5     0.464
6       20      17.5     0.334
6       12.5    5        0.263
6       12.5    30       0.488
6       12.5    17.5     0.579
6       12.5    1.75     0.575   
6       12.5    17.5     0.618
6       12.5    17.5     0.589
6       12.5    17.5     0.608
6       12.5    17.5     0.540


Ä£·Â±à³ÌÈçÏ£¬µ«ºÍÎÄÏ×½á¹û²»Ò»Ö£¬Çë°ïÐ޸ģº
data em;
input x1 x2 x3 do;
x4 = x1*x1;
x5 = x2*x2;
x6 = x3*x3;
x7 = x1*x2;
x8 = x1*x3;
x9 = x2*x3;
datalines;
3.69    8.17    10.28    0.667
8.31    8.17    10.28    0.000
3.69    1.683   10.28    0.732
8.31    1.683   10.28    0.176
3.69    8.17    24.72    0.788
8.31    8.17    24.72    0.164
3.69    1.683   24.72    0.760
8.31    1.683   24.72    0.000
2       1.25    17.5     1.009
10      1.25    17.5     0.000
6       5       17.5     0.464
6       20      17.5     0.334
6       12.5    5        0.263
6       12.5    30       0.488
6       12.5    17.5     0.579
6       12.5    1.75     0.575   
6       12.5    17.5     0.618
6       12.5    17.5     0.589
6       12.5    17.5     0.608
6       12.5    17.5     0.540
;
run;
proc reg data = em;
model do = x1 x2 x3;
run;
proc reg data = em;
model do = x1 x2 x3 x4 x5 x6 x7 x8 x9;
run;
quit;
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