[R] Re: new acf package

[Ole Christensen]

Dear Nicola

Your mail seems to have gone wrong - it went to R-announce instead of
R-help.

In the third issue of R-news (see http://cran.r-project.org/doc/Rnews)
there a nice article by Roger Bivand on spatial data analysis using R.
See also the second issue of R-news, the article by Ripley and the
presentation of package geoR.

Use a function to calculte the empirical variogram (for instance
function variog in package geoR). Using the empirical variogram is more
stable than using the empirical covariance function.

Cheers Ole

nicola marchetti wrote:
> 
> I'm a PhD student and I'm working with covariance function. I'm interested
> to know if exist some packages in R to calculate and plot the
> bidimensional Autocovariance Function. the input matrix is a matrix that
> describe a spatial location over a 2-D space and I want to use it in the
> same way I can use a time serie in the 1-D acf.
> Thanks,
> Nicola.
> 
> =================================================================
> Dr. Nicola Marchetti                    Phone: +39 0532 291331
> Chemistry Department                      Fax: +39 0532 240709
> University of Ferrara
> Luigi Borsari, 46
> I-44100 Ferrara
> ITALY
> 
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-- 
Ole F. Christensen
Department of Mathematics and Statistics
Fylde College, Lancaster University 
Lancaster, LA1 4YF, England
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