[R-sig-Geo] gwr error

[Roger Bivand]

On Thu, 25 Jan 2007, Jason Kreitler wrote:

> all,
> when running gwr i get the following error if i have fit points (either 
> SpatialPoints or a grid) included in the analysis, but i do not get the 
> error and the gwr routine runs when fit points are excluded. i don't 
> understand this but i think the problem is in my dataset, not the fit 
> points. could someone offer a suggestion based on the error below? i am 
> reading in the data via the readShapePoints command in Maptools.
> 
>  >Error in validityMethod(object) : number of rows in data.frame and 
> SpatialPoints don't match

Yes, but since there is no context here, I can't tell. What is the context 
of the error message (verbatim)? What does traceback() say immediately 
after the error? Do you know that the objects being input in the gwr() 
call are what you think they are? Are you setting mutually contradictory 
arguments?

If need be, can you make your data objects available by save() as an 
.RData file? This is assuming you don't want to debug() gwr yourself to 
see where your assumptions and the code are misunderstanding each other?

Roger

> 
> all the rows within my data frame have a value (some zero), and R reads 
> the correct number of rows when i do a summary, so i don't quite know 
> what to do. Any ideas?
> thanks much,
> jason
> 
> 

-- 
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