[R] Spatial Autocorrelation

[spencerg]

In addition to the taskview (below), you might consider using the "sos" 
package, something like the following: 


sa <- ???'spatial autocorrelation' # 58 matches
sc <- ???'spatial correlation' #  181 matches
s. <- sa|sc # union of the to 'findFn' objects
summary(s.) # 224 links in 57 packages
installPackages(s.)  # install packages with at least 5 >= 
sqrt(max(count)) matches
writeFindFn2xls(s.) # write an Excel file with 3 sheets:  PackageSum2, 
findFn, call


      This tells you that 22 help pages in "spdep" matched the search 
term, plus 18 pages in each of nlme, ncf, and spatstat, as well as 17 in 
ramps and 15 in geoR.  The "PackageSum2" sheet also provides other 
information to help you decide which package to consider first. 


      Beyond this, you may like to uses these functions with other 
search terms;  see vignette('sos') for more information. 


      Hope this helps. 
      Spencer
Disclaimer:  I'm the lead author of "sos". 


Corey Sparks wrote:
> Hi Paulo,
> if your data are distance matrices, you might consider doing a Mantel test,
> look at the mantel() function in package vegan.  While this is not
> technically measuring spatial autocorrelation, it will test for correlation
> between the attribute distances and the geographic distances.  Also, if you
> can coax your data back into a point shapefile (for example), you can use
> the tools in the spdep package which will measure actual spatial
> autocorrelation (such as Moran's I and Geary's C). 
> Best,
> Corey
>
>
> silcha wrote:
>   
>> Hi Paulo,
>> you may want to take a look at
>>
>> http://cran.r-project.org/web/views/Spatial.html
>>
>> there, you can find all "spatial" packages that 
>> can be useful for your question.
>> There is also a  a mailing list R-sig-geo that where 
>> you can ask all those kind of question.
>>
>> Hope that this helps.
>>
>> Cheers
>>
>> Anna
>>
>>
>>
>> Anna Freni Sterrantino
>> Ph.D Student 
>> Department of Statistics
>> University of Bologna, Italy
>> via Belle Arti 41, 40124 BO.
>>
>>
>>
>>
>> ________________________________
>> Da: P.Branco <pjlbranco at yahoo.com>
>> A: r-help at r-project.org
>> Inviato: Martedì 6 ottobre 2009, 13:28:36
>> Oggetto: [R]  Spatial Autocorrelation
>>
>>
>> Hello, 
>>
>> I have a matrix with the distances among sites. And I have another matrix
>> with the presence and absence of  each species in each site. I would like
>> to
>> test the spatial autocorrelation among sites.
>>
>> I have tried to use the function gearymoran of the ade4 package, but error
>> messages keep popping up. Do you know any function for me to test the
>> spatial autocorrelation of my data?
>>
>> Thanks,
>>
>> Paulo Branco
>> -- 
>> View this message in context:
>> http://www.nabble.com/Spatial-Autocorrelation-tp25767010p25767010.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
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>>
>>
>>     
>
>   


-- 
Spencer Graves, PE, PhD
President and Chief Operating Officer
Structure Inspection and Monitoring, Inc.
751 Emerson Ct.
San José, CA 95126
ph:  408-655-4567