[R-sig-Geo] spgwr: Invalid weights for i: 1

[jybarnagaud]

Dear all; 

I'm trying to run a gwr to show local estimates of a linear temporal trend
in a continuous variable on 806 data points sampled at least 8 times on a
1966-2011 period:

I got the following error while trying to select a bandwith with spgwr:

<http://r-sig-geo.2731867.n2.nabble.com/file/n7586890/Capture.png> 

Below is a short summary of my data object: 

<http://r-sig-geo.2731867.n2.nabble.com/file/n7586890/map.jpeg> 

shape of the response variable:

<http://r-sig-geo.2731867.n2.nabble.com/file/n7586890/histo.jpeg> 

Any idea of why it happens and any obvious solution, or any tips to find
where's the issue ?

A cheap alternative might be to select a manual bandwidth based on our
knowledge of the study system, but I couldn't find exactly how it should be
specified: is it expressed as a radius in km or something other?

Many Thanks!

JY Barnagaud



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