Re: question about gstat

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Re: question about gstat

Edzer Pebesma
Administrator
Hi Laure, I Cc:'d this to [hidden email], which is where I
intend to have the (now defunct) gstat-info traffic go. Many questions
regarding R/gstat also go to r-sig-geo.

Please have a look into the weights argument of ?gstat, which can be
also used in the krige functions. It is used to define inverse of the
variances of observations.

If you have further questions, please let me know.

With best regards,

On 05/02/2011 09:01 AM, Laure MALHERBE wrote:

> Dear Prof. Dr Pebesma,
>
> I recently registered on the Gstat-info mailing list but as I am not quite sure this mailing list is still active I prefer contacting you directly.
>
> Since about 3 years we have been intensively using gstat (in R environment) at Ineris for air quality mapping purposes. My colleague Anthony Ung and I are involved in the "spatial air quality data and assessments" task of the Topic Center. We recently had the pleasure to meet Lydia Gherarz in Oslo.
>
> For one of the subtasks we would like to perform some tests considering the individual error variance associated to each experimental datum. I was thinking of specifying a V field as mentioned in the gstat manual (Kriging data with known measurement errors) but I could not find how to define such field with R.  I should be very grateful if you could give me some indications on that point.
>
> Best regards,
>
> Laure Malherbe
>
> INERIS
> Chronic Risks Division
> Atmospheric modelling and environmental mapping Department
> tel: +33 3 44 55 62 18
>
>
>
>
>
>

--
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      [hidden email]
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