[R-sig-Geo] exact ponit location of dsease and clustering problem

[Marcelino de la Cruz]

At 23:56 07/09/2006, Debarchana Ghosh wrote:


>Hi,
>
>I have a data set with exact locations (x,y) of  West Nile Virus positive
>birds and mosquitoes. From what I read and understood (hopefully) in the
>Dcluster package, the clustering methods requires the study area to be
>divided into small regions and use the centroids of those constructed
>regions.  But in my case I have a study area and exact locations of 200
>positive birds. I was wondering how to use the clustering methods mentioned
>in the Dcluster package to do a cluster analysis of disease data points.
>Also if I cannot use the clustering methods in the DCluster  package,  what
>other methods/packages should I check to do a point clustering analysis.
>
>Any help on this will be very much appreciated.
>
>Thanks,
>Debs.
>
>--
>Debarchana Ghosh
>Research Assistant,
>Department of Geography
>University of Minnesota.
>PH: 8143607580
>www.tc.umn.edu/~ghos0033/


For point clustering analysis, you may consider reading  the interesting 
lecture-notes on Spatial Statistics for Environmental Epidemiology of Peter 
Diggle (you can find them on its personal web page 
(http://www.maths.lancs.ac.uk/~diggle/)


Marcelino


***************************************
Marcelino de la Cruz Rot
Depto. Biologia Vegetal
ETS Ingenieros Agronomos
Universidad Politecnica de Madrid
28040-Madrid
SPAIN
marcelino.delacruz at upm.es