[R-sig-Geo] Zerodist

[Edzer Pebesma]

OK.Res1 <- krige(Res1~1, DF[-zerodist(DF)[,1],], grd, vmf1)

On 11/20/2010 12:55 PM, Matevž Pavlič wrote:
> Hi Edzer, 
> 
> I have this line that i would like to use for kriging :
> 
> OK.Res1<-krige(Res1~1, loc=DF, newdata=grd, model=vmf1)
> 
> Where should i input d[-zerodist(d)[,1],]?
> 
> Thanks, m
> -----Original Message-----
> From: r-sig-geo-bounces at stat.math.ethz.ch [mailto:r-sig-geo-bounces at stat.math.ethz.ch] On Behalf Of Edzer Pebesma
> Sent: Saturday, November 20, 2010 12:39 PM
> To: r-sig-geo at stat.math.ethz.ch
> Subject: Re: [R-sig-Geo] Zerodist
> 
> if your data are in d, pass as data argument to the kriging function.
> 
> This arbitrarily removes duplicate points, so they are ignored in the kriging. If you want to do something more sophisticated, zerodist can be used to identify the duplicate pairs.
> 
> On 11/20/2010 12:29 PM, Matevž Pavlič wrote:
>> Hi all,
>>
>>  
>>
>> I got the
>>
>>> "chfactor.c", line 130: singular matrix in function LDLfactor()
>>
>> Error in predict.gstat(g, newdata = newdata, block = block, nsim = nsim,  : 
>>
>> LDLfactor<
>>
>>  
>>
>> Error, probably because there are some point pairs with zero distance in the matrix. My question is, how can i delete these duplicate nodes from the data set?
>>
>>  
>>
>> Thanks, m
>>
>>  
>>
>>  
>>
>>  
>>
>>
>> 	[[alternative HTML version deleted]]
>>
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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
> 
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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