Dear Paul, The command
RSiteSearch("nearest neighbour") Will give you the answer that you need. (The second hit is the function you want). Best regards, Thierry ---------------------------------------------------------------------------- ir. Thierry Onkelinx Instituut voor natuur- en bosonderzoek team Biometrie & Kwaliteitszorg Gaverstraat 4 9500 Geraardsbergen Belgium Research Institute for Nature and Forest team Biometrics & Quality Assurance Gaverstraat 4 9500 Geraardsbergen Belgium tel. + 32 54/436 185 thierry.onkel...@inbo.be www.inbo.be To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of. ~ Sir Ronald Aylmer Fisher The plural of anecdote is not data. ~ Roger Brinner The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data. ~ John Tukey > -----Oorspronkelijk bericht----- > Van: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] Namens Paul Duckett > Verzonden: dinsdag 5 april 2011 3:44 > Aan: R-help@r-project.org > Onderwerp: [R] Euclidean Distance in R > > Hi > > 1. I have two raster files *.asc (identical size) 2. The data > in each contain presence or absence data in each cell > represented by a 1 or 0 respectively 3. I would like to take > the location of each 1 (presence cell) in raster file 1 and > measure the euclidean distance to the nearest 1 (presence > cell) in raster file 2. > > Obviously in some cases there will be overlap so the distance > will be zero. > > 4. I would like the output file to have each individual > measurement on a seperate line in a single file. > > > I am very new to R, so any help would be appreciated. > > Best regards > Paul > -- > Paul Duckett - PhD Candidate > Conservation Genetics Lab > E8A 264 > Biological Sciences > Faculty of Science > Macquarie University > North Ryde > NSW 2109 > http://paulduckett.redbubble.com > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.