Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2008

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: FFT in Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg93688] Re: FFT in Mathematica
  • From: Oliver <sch_oliver2000 at yahoo.de>
  • Date: Sat, 22 Nov 2008 06:10:28 -0500 (EST)

Thanks a lot for ur very useful suggestions.
well sorry for saying "FFT" but i actually meant the fourier Transform in analytical way and not in nummeric way.
i plotted the FourierTransform of the function according to this:

Plot[FourierTransform[(1/(4*(Pi*1*t)^(3/2)))*Exp[-(3)/(4*1*t)], t, 
   f] // Abs, {f, 0, 100}]

but i actually got a very weird plot which does not make sense for the frequency.It produces a function in exponential behave.
where should be the mistake??!
maybe in the solution of the FourierTransform i got?  :

((-1 + Sign[f]) Sinh[
  Sqrt[Abs[f]] Root[9 + #1^4 &, 4]])/(2 Sqrt[6] \[Pi]^(3/2))

Thanks in Advance


  • Prev by Date: Re: Coloring Histograms
  • Next by Date: Re: Displaying the solution step by step in Wolfram Mathematica
  • Previous by thread: Re: FFT in Mathematica
  • Next by thread: Re: FFT in Mathematica