🚀 go-pugleaf

I am trying to fit compatible nonlinear basal area prediction and projection
models simultaneously. In SAS I used the following code:

proc nlin;
parms a0 =- 8.328216 
      a1=-15.5
      a2=.7
      a3=1.35
      a4=5.0
      b1 = -0.200545
      b2 = .062932;
if dum = 1 then do;
   model ba2= exp(a0+a1*x5+b1*y3 + a2*x1 + a3*x2 + a4*x4 ) ;
end;
else do;
   model ba2= ba1*exp(a1*x5+b1*y3 + a2*x1 + a3*x2 + a4*x4 );
end;
run;

We recently purchased S-Plus 2000, and are running the software on a PC with
Windows 95 and 128 MB RAM. Does anyone have any idea how I would approach
this problem with S-Plus?

Thanks for your assistance,

Chuck

Charles T. Stiff, PhD
Temple-Inland Forest Products Corporation
P.O. Drawer N
207 N. Temple Drive
Diboll, Texas 75941
Phone: 936-829-7852
FAX:    936-829-1601
E-mail: cstiff@templeinland.com

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