[R-sig-Geo] sample points - sp package

[Edzer Pebesma]

On 02/10/2012 06:13 PM, Ana wrote:
> When I make a sample in sp, for example a random samping of 5 points in
> dataset1:
> 
> sample.dataset1=spsample(dataset1, n = 5, "random")
> 
> I have a sp object for the selected sampling...
> 
> My question is : How can I extract from dataset2 the points & data for the
> coordinates(sample.dataset1) ?
> 
> The dataset2 would be an object with the same area and coordinate system,
> but I would like to extract for the coordinates of sample.dataset1 the data
> in each point for dataset2.
> 

over(sample.dataset1, dataset2)

> I didn't found a way to do this in the sp package docs, but I might have
> missed it. 

http://cran.r-project.org/web/packages/sp/vignettes/over.pdf

> 
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-- 
Edzer Pebesma
Institute for Geoinformatics (ifgi), University of Münster
Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de