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MathGroup Archive 2004

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Re: Trivial Fourier Transform Question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg45742] Re: [mg45729] Trivial Fourier Transform Question
  • From: "Sseziwa Mukasa,,(978) 536-2359" <mukasa at jeol.com>
  • Date: Fri, 23 Jan 2004 03:15:25 -0500 (EST)
  • References: <200401220837.DAA17472@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On Jan 22, 2004, at 3:37 AM, Lasse Rasmussen wrote:

> Is there an easy way to calculate the fourier series (discrete fourier
> transfrom) of a real function f(x) if I already know what the
> continuous fourier transform of f(x) is?

Easy is a relative term, but there is a well defined relationship  
between the discrete and continuous Fourier transforms.

> But how do I
> calculate the discrete fourier transform of a function, which fourier
> transfrom I know.

You can find a paper which answers your question at  
http://www.ecf.utoronto.ca/apsc/courses/bme595f/notes/ 
discretevscontinuousfouriertrans2003.pdf.

Regards,

Ssezi


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