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.pebe...@wwu.de
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