nonlin2.sas

SAS for Windows统计分析系统教程,里面有源码

title 'Logarithmic Curve,Model y=a+blnx';
options nodate nonumber;
data nonlin2;
  input x y @@;
cards;
0.2  7.6 0.4 12.3 0.6 15.7 0.8 18.2
1.0 18.7 1.2 21.4 1.4 22.6 1.6 23.8
;
proc nlin best=200 method=dud;
    model y=a+b*log(x)/* model y=a+blnx */;
parms a=18 to 20 b=16 to 18 by 1;
run;