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MathGroup Archive 1996

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Re: Fourier? (Q)

  • To: mathgroup at smc.vnet.net
  • Subject: [mg3662] Re: [mg3602] Fourier? (Q)
  • From: Jesus ROJO <jesroj at wmatem.eis.uva.es>
  • Date: Tue, 2 Apr 1996 21:56:02 -0500
  • Mailer: Elm [revision: 70.85]
  • Sender: owner-wri-mathgroup at wolfram.com


Your message:
> 
> greetings:
> 
> when i tried to go through the Fourier examples as per pgs 679-681 in the Mma bible;
> 
> Mma kindly returned the following:
> In[65]:=
> ?Fourier
> Fourier[list] finds the discrete Fourier transform of a list
>    of complex numbers.
> In[66]:=
> data={1,1,1,1,-1,-1,-1,-1}
> Out[66]=
> {1, 1, 1, 1, -1, -1, -1, -1}
> In[67]:=
> Fourier[data]
> Out[67]=
> Fourier[{1, 1, 1, 1, -1, -1, -1, -1}]
> 
> i then tried the example on a PowerMac, NeXT, RS6000 and got the same reply.
> 
> what am i missing here?
> 
> sincerely,
> m. r.
> 
> 


Hello,

after some essays, I have found that the key
is in the integer values in the list 'data'.
If you changes '1' for '1.' in 'data' you'll
find the expected answer. Why ?. I don't know.

			  Jesus ROJO

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