MATLAB: Aiba and Edwards mathematical modell

curve fittingexponential

Greetings, I am a rookie in terms of curve fitting, and i would like to estimate Kinetic parameters (umax, Ki, Ks) of Aiba and Edwards inhibition models. the
s=x=[100
200
300
400
500
600
800
1000
]; 
For Aiba: 1/u=y=[8.51
7.74
7.34
8.25
9.03
10.21
11.48
14.33];
For Edwards: u=y=[0.1175
0.1292
0.1362
0.1212
0.1107
0.0979
0.0871
0.0698
];
And the mathematical equations are:
Aiba: 1/u=Ks/umax*(1/s)exp(s/Ki)+1/umax*exp(s/Ki); 
Edwards: u=umax[exp(-s/Ki)-exp(-s/Ks)]
For both equations i am getting this message: Fit could not be computed due to error: Input to EIG must not contain NaN or Inf. Appreciate your help! Szabolcs

Best Answer

See Monod kinetics and curve fitting for an approach to a similar problem.
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