[R-sig-Geo] gstat error

[Edzer Pebesma]

The most common cause is that you have multiple observations at single 
locations. You can use function zerodist to figure out whether this is 
the case.

On 10/14/2011 06:11 PM, Sandeep Patil wrote:
> Hello
>
> I am running a Kriging cross validation in Automap. I get the following
> error
>
>
> "chfactor.c", line 130: singular matrix in function LDLfactor()
>
> I did check out the troubleshooting part of gstat manual which
>
> suggested two possible reasons
>
>
>
> during simulation, when an observation falls almost exactly at a simu-
> lation location. Solution: increase the value of zero
>
> when two observations occur at identical location occur and noaverage
> or average=0 was dened in a data denition. Solution: remove the
> noaverage, or add average=1
>
>
> Can someone elaborate what exactly is to be done in the above two options
> as i am finding it a bit cryptic.
>

-- 
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