about fft in octave

[fsshl]

Dear Heber or any octave expert:

   In May 16, 1998 help-octave mailing list, you mention about fft, can I tried 
using exp(-i*2*pi*t) that mean using imaginary number i.e. using sinc function 
with exp(-i*2*pi*f) to model shifted rectangular pulse in time domain from 
frequency domain inverse fourier transform to in any version 's octave?

 expect, need and thanks your help
Eric(address@hidden)




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