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Groups > comp.lang.java.programmer > #13139

Re: Fourier transform

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Roedy Green schrieb:
> On Wed, 21 Mar 2012 07:07:05 -0700 (PDT), bob<bob@coolfone.comze.com>
> wrote, quoted or indirectly quoted someone who said :
>
>> What would be the easiest way to do a Fourier transform in Java?
>
> see http://mindprod.com/jgloss/fft.html

You write in the above:

"Analysing a wave into its equivalent superimposed sine waves of various 
frequencies. You can think of it as separating out a tone from its 
overtones mathematically. Joseph Fourier (born: 1768-03-21 died: 
1830-05-16 at age: 62) was a French mathematician who proved this was 
always possible."

It depends on what you understand by a wave. There are the
dirichlet condition, the gibbs phaenomen etc.. which knowingly
invalidated Fouriers initial claim later on.

Bye

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Fourier transform bob <bob@coolfone.comze.com> - 2012-03-21 07:07 -0700
  Re: Fourier transform Patricia Shanahan <pats@acm.org> - 2012-03-21 07:46 -0700
  Re: Fourier transform glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-03-21 18:08 +0000
    Re: Fourier transform v_borchert@despammed.com (Volker Borchert) - 2012-03-21 22:59 +0000
      Re: Fourier transform glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-03-22 03:46 +0000
  Re: Fourier transform Frank Langelage <frank@lafr.de> - 2012-03-21 20:35 +0100
  Re: Fourier transform Lew <lewbloch@gmail.com> - 2012-03-21 18:14 -0700
  Re: Fourier transform Roedy Green <see_website@mindprod.com.invalid> - 2012-03-22 11:28 -0700
    Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 12:34 +0100
      Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 21:40 +0100
      Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 21:52 +0100
        Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 22:17 +0100
          Re: Fourier transform Arne Vajhøj <arne@vajhoej.dk> - 2012-03-24 18:52 -0400
            Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-25 00:34 +0100
        Re: Fourier transform Lew <noone@lewscanon.com> - 2012-03-24 14:55 -0700
          Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 23:24 +0100
            Re: Fourier transform Lars Enderin <lars.enderin@telia.com> - 2012-03-24 23:39 +0100
              Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 23:44 +0100
                Re: Fourier transform Lars Enderin <lars.enderin@telia.com> - 2012-03-24 23:53 +0100
                Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-25 00:27 +0100
              Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-24 23:46 +0100
        Re: Fourier transform Roedy Green <see_website@mindprod.com.invalid> - 2012-03-24 19:44 -0700
          Re: Fourier transform Lew <noone@lewscanon.com> - 2012-03-25 14:30 -0700
            Re: Fourier transform Gene Wirchenko <genew@ocis.net> - 2012-03-25 20:42 -0700
              Re: Fourier transform "John B. Matthews" <nospam@nospam.invalid> - 2012-03-26 09:48 -0400
                Re: Fourier transform Jan Burse <janburse@fastmail.fm> - 2012-03-26 16:06 +0200
          Re: Fourier transform Arne Vajhøj <arne@vajhoej.dk> - 2012-03-25 18:17 -0400

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