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Article #197Variogram versus Covariogram
From: Olivier D'hondt
Date: Thu, 22 Jan 2004 10:37
Date: Thu, 22 Jan 2004 10:37
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1143 bytes
Hello, I've read a lot of geostatistical articles where people use the variogram estimator instead of the sample autocovariance one, for reasons of unbiasedness. But there exists an unbiased version of sample autocorrelation that is much faster to compute with fft than variogram. My (naive) question is : why variogram ? Best Regards, Olivier
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fa931,6e88d2832694e5c7,start X-Google-Attributes: gidfa931,public X-Google-ArrivalTime: 2004-01-22 02:37:29 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!postnews1.google.com!not-for-mail From: olivierdhondt@yahoo.fr (Olivier D'hondt) Newsgroups: aus.stats.s Subject: Variogram versus Covariogram Date: 22 Jan 2004 02:37:28 -0800 Organization: http://groups.google.com Lines: 8 Message-ID: <b55bc55b.0401220237.e318c03@posting.google.com> NNTP-Posting-Host: 129.20.82.109 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 1074767849 24383 127.0.0.1 (22 Jan 2004 10:37:29 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 22 Jan 2004 10:37:29 +0000 (UTC)