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