[R-sig-Geo] SpatialGridDataFrame to SpatialPixelDataFrame

[Nikhil Kaza]

You have a typo.

It is SpatialPixelsDataFrame. note the s

Nikhil Kaza
Asst. Professor,
City and Regional Planning
University of North Carolina

nikhil.list at gmail.com

On Aug 25, 2010, at 4:43 AM, Dorothea Lemke wrote:

> Dear list,
>
> I have problems to coerce a SpatialGridDataFrame object to a
> SpatialPixelDataFrame. I 've calculated a kerneldensity (splancs)  
> and I want
> to convert the results from the SpatialGridDataFrame to a
> SpatialPixelDataFrame.
>
> My R-code:
>
>> library (maptools)
>> library (splancs)
>> library (rgdal)
>
>> kcasesC67m<-spkernel2d(cases, pRBMS, h0=3500, gt)
>> kcontrolsC67m<-spkernel2d(controls, pRBMS, h0=3500, gt)
>> df<-data.frame(kcasesC67m=kcasesC67m, kcontrolsC67m=kcontrolsC67m)
>> spkratio<-SpatialGridDataFrame(gt, data = df)
>> spkratioP<-as(spkratio, "SpatialPixelDataFrame")
>
> But I get the error message: "No methods and no standards to convert
> SpatialGridDataFrame in SpatialPixelDataFrame".
>
> Many thanks for your help
> Dorothea
>
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