/* nllsqt0.sas  -- demonstration of nonlinear least squares */
/*  on a linear (polynomial) regression problem             */
/*                                                          */
  options ls = 80 ;               * easier to read output ;
  data a ;
    input x y ;
    xx = x*x ;
    cards ;
  1   4.5
  2   5.5
  3   6.5
  4   8.0
  5  10.0
  6  12.0
 ;
 run ;
/*                                                          */
/*                    write out the data                    */
   proc print data=a ;
    title 'nllsqt0 -- nonlinear least squares problem' ;
 run ;
/*                                                          */
/*                    easy problem -- polynomial regression */
   proc reg data=a ;
    model y = x xx ;
    title2 'real, real easy -- just quadratic regression' ;
 run ;