[R-sig-Geo] predict() LDL error

[Edzer Pebesma]

The error message is an indication that you're predicting (kriging) with
a singular covariance matrix. The most frequent reasons for this are
duplicate observations [1] or perfect correlation in the
coregionalization model [2]. For [1], see ?remove.duplicates, for [2]
see argument correct.diagonal in ?fit.lmc.

On 07/14/2011 06:18 PM, Matevž Pavlič wrote:
> Hi all, 
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> i am trying to use categorical kriging for prediction of soil classes in an area. I am pretty new to using cat. kriging in R soI probably am making some beginers mistakes. Attached is a reproducable sample with sample data. 
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> When i try to use predict() i geta n error- I am pretty sure because some points are duplicated....in krige() function i use zerodist() which eliminates the LDL error, but i can't find a way to use it here....
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> I got this code (mostly) from the net, so i have some trouble understanding it...
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> thanks for any help and info about categorical kriging, 
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> m
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de