Hi Debs.

I do not think any of the statistical methods implemented
in DCluster is suitable for the analysis of point
processes in their current state. Some of them could
be used with ppoint proesses (GAM, Spatial Scan), but 
the current implementation of the methods assumes 
areal data.

For the analysis of point processes you can check 
packages Splancs and Spatstat. In addition to Prof. Diggle's
web site that someone else pointe out, you can check the
website of the MsC Course in Environmental Epidemiology 
(Lancaster University):

http://www.maths.lancs.ac.uk/department/study/years/msc/modules/math465


Hope this helps,

Virgilio

-----Original Message-----
From: r-sig-geo-bounces@stat.math.ethz.ch on behalf of Debarchana Ghosh
Sent: Thu 9/7/2006 10:56 PM
To: r-sig-geo@stat.math.ethz.ch
Subject: [R-sig-Geo] exact ponit location of dsease and clustering problem
 
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/

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