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feifeihu0225

木虫 (小有名气)

[求助] 用SAS数据分析软件拟合方程,试了三个,感觉都可以用。。不知道该怎么办。求高手指点

data power;input x y @@;
cards;
1 94.444 2 91.176 3 85.367  4 80.714 5  77.647 6  69.540 7 66.189
;
proc plot;plot y*x;proc nlin;parms a=0 b=0;model y=a*(x**b);
output out=d predicted=yp;proc print;run;
proc plot;plot y*x yp*x='*'/overlay;run;
data power;input x y @@;Y1=LOG(Y);X1=log(x);
cards;
1 94.444 2 91.176 3 85.367  4 80.714 5  77.647 6  69.540 7 66.189
proc reg; model y1=x1;run;
data reg;input x y @@;
cards;
1 94.444 2 91.176 3 85.367  4 80.714 5  77.647 6  69.540 7 66.189
proc reg; model y=x;run;
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