[R-sig-Geo] GWR with GWT file

[Danlin Yu]

Jay:

Some time ago, the alternative weighting scheme issue was raised, but no 
solution as far as I know was present. As for now, I don't think SPGWR 
is taking other weighting schemes than the coordinates determined 
distance. I believe it is doable, however, by implementing some sort of 
alternative distance and replace the *coord* argument in the gwr function.

Hope this helps.

Cheers,
Danlin Yu

Jay Douillard ??:
> I'm working on a project where the distance between two polygons may be a poor measure of connectivity(contigious polygons that may have an impassible mountain chain between them. To get a better measure of distance I've used road network distances from population weighted centroids of the polygons. I've created a row standarized gwt style file using arcgis's network tools, and a bit of table editing. I can successfully import this into R.
> File format in "old style GWT"
> for example: 
> 473
> 1 2 .111
> 1 3 .22
> 1 4 .66
> 2 1 .11
>
>
> Is possible to use your own weighting scheme in spgwr? Is it using a listw object? I couldn't find any indication in the documentation.
>
> thanks!
>    
>
> ----
> Jay Douillard
> Geospatial Technical Lead
> 604.827.4401
> Human Early Learning Partnership 
> www.earlylearning.ubc.ca
>
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>   

-- 
___________________________________________
Danlin Yu, Ph.D.
Assistant Professor of GIS and Urban Geography
Department of Earth & Environmental Studies
Montclair State University
Montclair, NJ, 07043
Tel: 973-655-4313
Fax: 973-655-4072
email: yud at mail.montclair.edu
webpage: csam.montclair.edu/~yu