data 1
function fy=nfx(b,x)
fy=(b(1)*x+b(2)*x.^2+b(3)*x.^3)./(1+b(4)*x+b(5)*x.^2+b(6)*x.^3);
SSy=3.4400
Bopt=[.4154373355, -.5532364755e-1, .1877348754e-2, -.1045767934, .2856788749e-2, -196158.0952]
RSS=.9609606047e-1
MSe=0.0240
R^2=.972065
data 2
function as above
SSy= 9.1963e+004
B=[1.927216788, .8366412653e-2, -.2337834530e-5, .2971022139e-1, .2162947148e-5, -113839931.7]
RSS=5.783113838
MSe=1.1566
R^2=.999937
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