Re: [R] How to sample x-y coordinates from GIS files

From: ecoinfo <ecoinformatics_at_gmail.com>
Date: Wed 06 Jul 2005 - 23:11:28 EST

GIS-related packages in R:
shapefiles
maptools
sp
spdep
adehabitat
GRASS
PBSmapping
etc.
 --Xiaohua

 On 7/6/05, Kum-Hoe Hwang <phdhwang@gmail.com> wrote:
>
> Hi Gurus!
> I have a job that is to get randomly samples from point-based GIS data (sp
> called shape GIS files) under the total sum resctricted.
> For example, I would like to take random smaples under the 1000 persons in
> each city.
> The randomly sampled persons should not be over 1000 any case.
> Thank you in advance,
>
> --
> Kum-Hoe Hwang, Ph.D.
>
> Phone : 82-31-250-3283
> Email : phdhwang@gmail.com
>
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>
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-- 
Xiaohua Dai, Dr.
Centre for Systems Research, Durban Institute of Technology
P.O.Box 953, Durban 4000, South Africa
Tel: +27-31-2042737(O) Fax: +27-31-2042736(O)
Mobile: +27-723682954
Email: daixiaohua@nju.org.cn, xiaohua@dit.ac.za
Publications: http://www.getcited.org/?MBR=11061629

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Received on Wed Jul 06 23:13:40 2005

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