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Problem of nonlinear curve fitting

  1. Sep 19, 2009 #1
    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
     
  2. jcsd
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