[R-sig-Geo] Number of duplicated pixels

[Edzer Pebesma]

Maybe sp::zerodist helps:

> library(sp)
> loadMeuse()
> table(zerodist(meuse[c(1:10,4:5),], unique.ID=TRUE))

 1  2  3  6  7  8  9 10 11 12
 1  1  1  1  1  1  1  1  2  2
> (zerodist(meuse[c(1:10,4:5),], unique.ID=TRUE))
 [1]  1  2  3 11 12  6  7  8  9 10 11 12


On 12/28/2011 06:28 PM, Komine wrote:
> Thank Roman for your answer,
> In fact, I arrived to obtain the matrix with the duplicated coordinates. But
> I want a automatically method to know the frequency of the duplicated
> coordinates using perhaps "length". 
> Thank you in advance 
> Komine 
> 
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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