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Re: discrete Fourier transform

  • To: mathgroup at
  • Subject: [mg121063] Re: discrete Fourier transform
  • From: Bill Rowe <readnews at>
  • Date: Fri, 26 Aug 2011 05:21:55 -0400 (EDT)
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On 8/25/11 at 7:05 AM, tarunduttaz at (tarun dutta) wrote:

>I have a text file (in my desktop)in which there are two columns one
>is time and another is the result as 0   0.956 2   0.265
>...................etc now I have to plot the data after doing
>discrete fourier transform of this will I do that ? I used

>data=Import["output.txt", "Table"]
>but itz not working.can any one help me by giving a solution.

In general, the output of Fourier will be a list of complex values rather than real values. So, try


to plot the magnitude or


to plot the phase

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