[R] Spatial Statistics on Grids

[David Winsemius]

On Jun 23, 2009, at 1:29 PM, Peter Biber wrote:

> Thanks David,
>
> Actually, I googled quite some time before posting my question. I'm  
> also
> aware, that there are many packages for spatial data analysis.  
> However, I
> found no hint if any of them contains methods for characterizing  
> (and I
> don't mean just plotting) the distribution (e.g. pure random,  
> clustered,
> regular) of grid cells (not point data) with R.
>
> I someone out there has used R for similar tasks, I still would  
> appreciate
> his/her hints/comments.

I still cannot tell what sort of methods you have considered and  
rejected. I would have thought that any process examined on a computer  
would be done on a "regular grid". Points are an abstract concept,  
grids are the implemented reality. I would have thought that notions  
of 2D density, which are undoubtedly present in every introductory  
source regarding spatial analysis, would be the obvious first pass at  
answering your question. Apparently you are not looking for density  
estimates?

>
> -----Ursprüngliche Nachricht-----
> Von: David Winsemius [mailto:dwinsemius at comcast.net]
> Gesendet: Dienstag, 23. Juni 2009 16:47
> An: Peter Biber
> Cc: r-help at r-project.org
> Betreff: Re: [R] Spatial Statistics on Grids
>
>
> On Jun 23, 2009, at 10:21 AM, Peter Biber wrote:
>
>> Dear colleagues,
>>
>> I'm searching for methods to analyze spatial distributions of cells
>> with certain properties in a regular grid. For instance, consider a
>> grid, where a part of the cells have the property "0", and the others
>> have the property "1". I'm looking for statistics I could use for
>> characterizing the spatial distribution of the "1-cells".
>>
>> Does anyone know about R-packages, where such methods are  
>> implemented?
>>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT