[R] Euclidean Distance in R

[ONKELINX, Thierry]

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.Onkelinx op 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-bounces op r-project.org 
> [mailto:r-help-bounces op r-project.org] Namens Paul Duckett
> Verzonden: dinsdag 5 april 2011 3:44
> Aan: R-help op 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
> 
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