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. I didn't found a way to do this in the sp package docs, but I might have missed it. -- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/sample-points-sp-package-tp7273420p7273420.html Sent from the R-sig-geo mailing list archive at Nabble.com.
sample points - sp package
2 messages · Ana, 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
-- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/sample-points-sp-package-tp7273420p7273420.html Sent from the R-sig-geo mailing list archive at Nabble.com.
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Edzer Pebesma Institute for Geoinformatics (ifgi), University of M?nster Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251 8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de http://www.52north.org/geostatistics e.pebesma at wwu.de