Date: Feb 4, 2013 3:32 PM
Author: Derek Goring
Subject: Re: Transform Time domain data ( in txt format) to Frequency Domain

On Tuesday, February 5, 2013 6:03:08 AM UTC+13, Meran   wrote:
> Dear ALL
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> I am trying to transform data from time domain which i have them in" txt" format to frequency domain by using " FFT ". The txt data has to columns ( 1st :Time) and (2nd :amplitude). I don't know , i need to use FFT(x) or FFT(x,n) and how can plot the data in have in time domain and plot in frequency Domain .
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> Thanks for you Help .


You need to convert from 'txt' format (whatever that means) to numbers before you plot or use fft:
help str2num