NInverseFourierTransform


gives a numerical approximation to the inverse Fourier transform of expr evaluated at the numerical value t, where expr is a function of ω.

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  • To use , you first need to load the Fourier Series Package using Needs["FourierSeries`"].
  • The numerical approximation to the inverse Fourier transform of expr is by default defined to be NIntegrate[expr -ωt,{ω,-,}].
  • Different choices for the definition of the inverse Fourier transform can be specified using the option FourierParameters.
  • With the setting FourierParameters->{a,b}, the inverse Fourier transform computed by is NIntegrate[expr -bωt,{ω,-,}].
  • The parameter b in the setting FourierParameters->{a,b} must be numeric.
  • In addition to the option FourierParameters, can also accept the options available to NIntegrate. These options are passed directly to NIntegrate.

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基本范例  (1)基本范例  (1)

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Numerical inverse Fourier transform for a polynomial-exponential function:

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Compare with the answer from symbolic evaluation:

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