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From: Diego Alberto Arias Prado
Subject: fft
Date: Thu, 29 Oct 1998 14:25:00 +0100

        There is something in the fft() function that I don't understand. I
compute the fft of a vector containing the samples of a sinc(), an exp() and
a rectangular pulse and what I get is a vector of the same size. What I
don't understand is this: in the positions 1, 2, 4.. and N-3, N-2, N-1 and N
of the vector (its size is 1 N) I get "big" values and in the central
positions the values (I mean, far from 1 and N) I get values near to cero.
        Thus, from transforming a sinc() I get something that hasn't
anything to see with a rectangular pulse (for example). HELP!
        Thanks in advance.

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