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Fourier transform

  • To: mathgroup at
  • Subject: [mg43444] Fourier transform
  • From: Ch akpovo <akpovo at>
  • Date: Wed, 17 Sep 2003 07:59:00 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

I'm using Time Series Package and I noticed that there is a difference
between the power spectrum computed from the command Spectrum[] and that
using Abs[Fourier[]. I would like to know why that difference and which
method is the best as far as deriving the energy (parseval's theorem)
carried in the data is concerned.
Can anyone help?
ch akpovo
Laboratory for Modern Fluid Physics
Florida A & M University
Phone: 850 561 2473
Fax: 850 561 2474 

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