Re: discrete Fourier transform
- To: mathgroup at smc.vnet.net
- Subject: [mg121063] Re: discrete Fourier transform
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Fri, 26 Aug 2011 05:21:55 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
On 8/25/11 at 7:05 AM, tarunduttaz at gmail.com (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 data.how will I do that ? I used >data=Import["output.txt", "Table"] >pt=Fourier[data] >ListLinePlot[pt] >but itz not working.can any one help me by giving a solution. >regards, >tarun In general, the output of Fourier will be a list of complex values rather than real values. So, try ListLinePlot[Abs@pt] to plot the magnitude or ListLinePlot[Arg@pt] to plot the phase