Re: Fourier transforms

[Roger Haar <haar@PHYSICS.ARIZONA.EDU>]

Ludwik,

        Being a hard core experimentalist, my suggestion
is that you try a few Fourier series synthesis two
answer you question.  Take the first 4-6 terms of
the Fourier representation of a square wave, and
flip a sign or two.  THis is pretty straingt
forward with a spreadsheet.  If you did a Fourier
analysis on the newly formed curve you should get
the negative amplitudes.

Thanks
Roger



Ludwik Kowalski wrote:
> 2) And here is my own question. What meaning should be
> attached to negative w which my program generates? The
> distributions of F(w), for the f(t)=cos(A*t) wave trains, are
> always symmetrical with respect to w=0; how should
> negative w be interpreted?
> Ludwik Kowalski