Path: news.mathworks.com!not-for-mail
From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: autocorrelation of sine function
Date: Fri, 14 Mar 2008 08:32:01 +0000 (UTC)
Organization: The MathWorks, Inc.
Lines: 15
Message-ID: <frdd61$grl$1@fred.mathworks.com>
References: <frb892$pf5$1@fred.mathworks.com> <frbblq$hff$1@fred.mathworks.com>
Reply-To: <HIDDEN>
NNTP-Posting-Host: webapp-02-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1205483521 17269 172.30.248.37 (14 Mar 2008 08:32:01 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Fri, 14 Mar 2008 08:32:01 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 1216156
Xref: news.mathworks.com comp.soft-sys.matlab:457190



"Malcolm Lidierth" <ku.ca.lck@htreidil.mloclam> wrote in 
message <frbblq$hff$1@fred.mathworks.com>...
> try [c,lags]=xcorr(signal,'unbiased');
> 
> Coeff estimates are biased - for lags greater than zero 
the 
> number of valid data point pairs falls off to 1 at abs
(lag)
> ==data length.
>

Thanks a lot. It gives the right plot. I don't understand 
what do you mean by data point pairs falls off to 1 at abs
(lag) ==data length.