Fitting for Complex Exponential Signal

Function ComplexExponential(w,xx) : FitFunc
    Wave w
    Variable xx
 
    //CurveFitDialog/ These comments were created by the Curve Fitting dialog. Altering them will
    //CurveFitDialog/ make the function less convenient to work with in the Curve Fitting dialog.
    //CurveFitDialog/ Equation:
    //CurveFitDialog/ f(xx) = C * real(exp(cmplx(ar, ai)*xx))
    //CurveFitDialog/ End of Equation
    //CurveFitDialog/ Independent Variables 1
    //CurveFitDialog/ xx
    //CurveFitDialog/ Coefficients 3
    //CurveFitDialog/ w[0] = C
    //CurveFitDialog/ w[1] = ai
    //CurveFitDialog/ w[2] = ar
 
    return w[0] * real(exp(cmplx(w[2], w[1])*xx))
End