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Problem of nonlinear curve fitting

  • Thread starter dot27
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helo,
I am dealing with a problem of nonlinear curve fitting.
I have estimted samples of a continous fourier transform function, and my goal is to reach from fourier to laplace transform using the known equality: F(S=jw)=laplace{h(t)}.
i want to represnet the laplace trnsform in the following form:
1/(as^2+bs+c), the parameters a, b, c are to be detetmined:
F(jw)*(a(jw)^2+b(jw)+c)=1,
using the eq above in all the freqenqcies F(jw) was estimated.
now i can use the method of nonlinear least squares.
how do i implement this in matlab???

Thx
 

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