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MathGroup Archive 2001

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Re: 2D Fourier and Plot3D???

  • To: mathgroup at smc.vnet.net
  • Subject: [mg28186] Re: [mg28111] 2D Fourier and Plot3D???
  • From: Tomas Garza <tgarza01 at prodigy.net.mx>
  • Date: Tue, 3 Apr 2001 02:38:04 -0400 (EDT)
  • References: <200103310758.CAA13042@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

I'm sure there is a simple way to do it. Could you please send your data
from the very beginning and a copy of your notebook?

Tomas Garza
Mexico City
----- Original Message -----
From: "Patrick Ladam" <ladam at smbh.smbh.univ-paris13.fr>
To: mathgroup at smc.vnet.net
Subject: [mg28186] [mg28111] 2D Fourier and Plot3D???


> Hello to all,
>
> I am desperatly trying to have a display of a 2D Fourier transform of
> data in vain...
> I don't have my notebook here but here is what I have done:
> I was able to generate a 2D list of data (each list having 2^n data for
> discrete FT) using:
>
Abs[Fourier[{{my_function_of_x},{my_function_of_y}},{(x,0,255),(y,0,255)}]]
>
> it gave me a 2D list looking like:
> {{value_a, value_b, ....},{value_w, value_z,.... }}
> each list having 256 elements
> Now when I try to have a 3D plot of this it won't work
> I tried a huge amount of combinations to get this 3D plot using
> Do[Plot3D[blablabla]] and it never
> worked....
> It looks to me that the arguments expected by Plot3D or ListPlot3D are
> uncompatible with those
> of the Fourier command.
> There is I guess a way of doing this sort of thing so if someone has
> some guidance I would really
> appreciate (I have spent hours and hours with no success...)
> A piece of code would be the best if you have one under the arm....
>
> ThanX a lot
>
> Bye
>
> --
> ------------------------------------------------------------------
> | Patrick LADAM                   |                               |
> | Laboratoire CSSB                |     THE BIG BANG THEORY:      |
> | UFR SMBH                        |                               |
> | 74 rue Marcel Cachin            |   In the begining there was   |
> | 93017 Bobigny CEDEX             |        nothing at all.        |
> | >>> NEW e-mail: <<<             |                               |
> | ladam at smbh.smbh.univ-paris13.fr |      Then, it exploded...     |
> | Tel: 01 48 38 77 26 / 76 85     |                               |
> | Fax: 01 48 38 77 77             |                               |
> ------------------------------------------------------------------
>
>
>
>



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