Hi Javier -

I was thinking of using a cressman in place of an IDW scheme for
interpolating. The reason would be because you can optimize the Radius of
influence which has some physical meaning as opposed to optimizing the
power in IDW.
Where does the exponential decay fit into the equation?
Thanks!

Dominik Schneider
o 303.735.6296 | c 518.956.3978



On Fri, Jun 13, 2014 at 10:45 PM, Javier Garcia-Pintado <
j.garcia-pintado@reading.ac.uk> wrote:

> Hi Dominik,
>
> a) It won't take you more than a few of lines to code the Cressman
> analysis in R. You just need to decide what metric to use for the weighting
> function [e.g. a distance-based exponential decay?]
>
> b) Are you sure you want to use a Cressman analysis? It certainly is not
> the state-of-the-art in Data Assimilation
>
>
> Regards,
> Javier
>
>
> ________________________________________
> From: r-sig-geo-bounces@r-project.org [r-sig-geo-bounces@r-project.org]
> on behalf of Dominik Schneider [Dominik.Schneider@colorado.edu]
> Sent: 13 June 2014 23:49
> To: r-sig-Geo@r-project.org
> Subject: [R-sig-Geo] cressman analysis
>
> Are there any implementations in R of the Cressman interpolation?
>
> https://nsidc.org/data/docs/daac/nsidc0033_arctic_water_vapor/cressman_equations.html
> I haven't found anything via rseek or google.
> Thanks Dominik
>
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