[R-sig-Geo] GWR

Roger Bivand Roger.Bivand at nhh.no
Wed Nov 29 11:33:56 CET 2006

On Wed, 29 Nov 2006, CARMEN RODRIGUEZ wrote:

> I insist on GWR. To run a GWR model I'm using both R and GWR 3.0. Comparing 
> the estimated coefficients for an adaptative bisquare kernel in R with the 
> results for an adaptative kernel in GWR 3.0 (which is supposed to be a 
> bisquare function too), differences are very big. I check the bandwidths and 
> they are not that different (as I understand, in R the adaptative bandwidth 
> is expressed as a percentage of observations, while in GWR 3.0 the bandwidth 
> is the number of observations itself). But anyway, the estimated 
> coefficients shouldn't be so different, should they?

Well, without documentation, it is impossible to tell. So please provide 
documentation, access to data and scripts of what you are doing that 
worries you. We cannot see over your shoulder.


> Thank you.
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Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no

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