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Re: correlation function

• To: mathgroup at smc.vnet.net
• Subject: [mg128709] Re: correlation function
• From: "Nasser M. Abbasi" <nma at 12000.org>
• Date: Mon, 19 Nov 2012 04:08:57 -0500 (EST)
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On 11/18/2012 4:21 PM, jure lapajne wrote:
> Why can I see the answer on my email, but not here?
> Anyway, I tried your code. I only changed data and the code does not return vector
>  of zeros. Here are my data:
> https://docs.google.com/file/d/0B6pDMaS9TDltcnp2UThFYjlPTFk/edit
>

Becuase many times I send a post to this newsgroup and it never shows up.
This is not the first time.

[Sometimes, news servers fail to send out a message. When you see this
happen send me an email about it - moderator] 

Here it is again. I am using version 8.0.4

Date: Sun, 18 Nov 2012 04:31:35 -0600
From: "Nasser M. Abbasi" <nma at 12000.org>
Newsgroups: comp.soft-sys.math.mathematica
CC: jure lapajne <lapajne.jure at gmail.com>

-----------------------------
data  = Table[RandomReal[], {10}];
parms = FourierParameters -> {1, -1};
fft   = Fourier[data, parms];
res1  = Chop[fft*Conjugate[fft]];
res2  = Chop[Fourier[ListCorrelate[data, data, {1, 1}], parms]];
Chop[res1 - res2]
------------------------

Out[38]= {0,0,0,0,0,0,0,0,0,0}

--Nasser