Hi, all, Have anyone used kringing included in R? How is it? Does it handle anisotropy data well? How does it compare with Kriging in Arc/Info? or other geostatistics software customized to do kriging or other geostatistics functions? I tried Easykriging, a geostatistics tool developed for Matlab. It has very nice GUI, but it does not provide library which i can call in my programs. so it is good for doing it mannually for small number of data set. but if i have large number of data set, and i want to automate the kriging process for those data set, Does anyone have good recommendation on what software to use? something that can be called in c/c++ code(or matlab) and freeware:) is preferred.. Thanks a lot in advance for any input. yan
Lots of questions! Kriging in geostatistics software often uses rather peculiar approximations to the exact theory, and `data' cannot be anisotropic (but models can). There is kriging in packages spatial, sgeostat and fields, at least, as a quick look at the FAQ would have shown you. It is unlikely that an R package will provide you with C/C++ code that is independent, but some are based on such code. If you want independent code, you should look elsewhere (e.g. GSLIB). On Thu, 16 Jan 2003, Yan Yu wrote:> Hi, all, > Have anyone used kringing included in R? How is it? > Does it handle anisotropy data well? > How does it compare with Kriging in Arc/Info? or other geostatistics > software customized to do kriging or other geostatistics functions? > > I tried Easykriging, a geostatistics tool developed for Matlab. It has > very nice GUI, but it does not provide library which i can call in my programs. > so it is good for doing it mannually for small number of data set. but if > i have large number of data set, and i want to automate the kriging > process for those data set, Does anyone have good recommendation on what > software to use? something that can be called in c/c++ code(or matlab) > and freeware:) is preferred.. > > Thanks a lot in advance for any input. > yan > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > http://www.stat.math.ethz.ch/mailman/listinfo/r-help >-- Brian D. Ripley, ripley at stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
On Thu, 16 Jan 2003, Yan Yu wrote:> Hi, all, > Have anyone used kringing included in R? How is it? > Does it handle anisotropy data well? > How does it compare with Kriging in Arc/Info? or other geostatistics > software customized to do kriging or other geostatistics functions?Maybe help.search(), or the search item at the R-project website? The following packages (among others) include kriging in some form or other. The spatial package in the VR bundle is installed by default. The sgeostat package is interpreted. Both of fields and geoR are compiled - so there's no lack of choice! Comparison with recent Arc/Info is more difficult, the work being done there by Konstantin Krivoruchko and others is impressive. Maybe try several R packages and AI on the same real data to get a feel for how they perform in relation to your needs? The resources on http://www.ai-geostats.org/ may also help.> > I tried Easykriging, a geostatistics tool developed for Matlab. It has > very nice GUI, but it does not provide library which i can call in my programs. > so it is good for doing it mannually for small number of data set. but if > i have large number of data set, and i want to automate the kriging > process for those data set, Does anyone have good recommendation on what > software to use? something that can be called in c/c++ code(or matlab) > and freeware:) is preferred.. >Roger -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93 e-mail: Roger.Bivand at nhh.no
Hi I'm working with geostatistics and I use geoR package, which I find very good. However it doesn't implement the classic geostatistics but a "model based geostatistics" as proposed by Peter Diggle and team. R news of June 2001 has an article about geoR by Paulo Ribeiro, the main developer, that you might like to take a look at. I find this number of Rnews a very good source for someone willing to use geostatistics in R. Regards EJ On Fri, 2003-01-17 at 05:06, Yan Yu wrote:> Hi, all, > Have anyone used kringing included in R? How is it? > Does it handle anisotropy data well? > How does it compare with Kriging in Arc/Info? or other geostatistics > software customized to do kriging or other geostatistics functions? > > I tried Easykriging, a geostatistics tool developed for Matlab. It has > very nice GUI, but it does not provide library which i can call in my programs. > so it is good for doing it mannually for small number of data set. but if > i have large number of data set, and i want to automate the kriging > process for those data set, Does anyone have good recommendation on what > software to use? something that can be called in c/c++ code(or matlab) > and freeware:) is preferred.. > > Thanks a lot in advance for any input. > yan > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > http://www.stat.math.ethz.ch/mailman/listinfo/r-help-- Ernesto Jardim <ernesto at ipimar.pt> Marine Biologist Research Institute for Agriculture and Fisheries Lisboa, Portugal Tel: +351 213 027 000 Fax: +351 213 015 948