MathGroup Archive 2007

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Fit


Hello,
I have an expression of the form:

8000000 Sqrt[2/\[Pi]] (-Erf[(-300 + x)/(4000 Sqrt[2])] +
    Erf[(300 + x)/(4000 Sqrt[2])]) (-1/2 Sqrt[\[Pi]/2]
      Erf[(-300 + y)/(4000 Sqrt[2])] +
    1/2 Sqrt[\[Pi]/2] Erf[(300 + y)/(4000 Sqrt[2])])

how can I make a fit using a 2D Gaussian function of the form

Gaussian2D[x_, y_, Radius_, Amplitude_] :=
   Amplitude Exp[-1/2 ((x/Radius)^2 + (y/Radius)^2)];

Thank you for your help!
MG


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