[R] Re: new acf package
o.christensen at lancaster.ac.uk
Thu Apr 11 13:12:29 CEST 2002
Your mail seems to have gone wrong - it went to R-announce instead of
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.
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.
> Dr. Nicola Marchetti Phone: +39 0532 291331
> Chemistry Department Fax: +39 0532 240709
> University of Ferrara
> Luigi Borsari, 46
> I-44100 Ferrara
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Ole F. Christensen
Department of Mathematics and Statistics
Fylde College, Lancaster University
Lancaster, LA1 4YF, England
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