[Scilab-users] Non linear regression

[Kleper Oliveira Rocha]

Dear colleagues,

I want to fit data to an equation like
[image: Imagem inline 1]
 where a, beta1, b and beta2 must be determined.

The data are:

y                     Pco        PH2

0.00495       1.0          0.1
0.00742       1.0          0.5
0.00525       1.0          4.0

In the book of Fogler (Elements of Chemical Reaction Engineering) I have
the answer

a = 0.02527
beta1 = 0.6166
b = 2.4872
beta2 = 1.0262

How can I fit the data above to the equation in Scilab?

Thanks in advance.
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*Kleper de Oliveira Rocha*
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