[STATSGRASS] gstat: problem with prediction value at point location

[Jarosław Jasiewicz]

Roger Bivand napisał(a):
> On Tue, 23 Jan 2007, Edzer J. Pebesma wrote:
>
>   
>> My guess is that the technique you're referring to (and used by 
>> Geostatistical Analyst, afaik) is [kriging in] cross 
>> validation---observations are left out to obtain a kriging estimate for 
>> which it makes sense to compare it with the observation. Definitely 
>> distinct from kriging, which does not leave observations out.
>>     
>
> When run head to head, gstat CV LOO (leave one out) on trend surfaces and 
> GA give the same results, so, yes, GA seems by default to do LOO CV.
>
> Roger
>
>   
Sorry I didn't uderstand that...
Jarek