[R-sig-Geo] inter-point distance calcs

[Jim Bouldin]

Good grief, yes dist() will do quite nicely.  Pardon the more or less
continuous brain lock while I learn R.  Thanks.
Jim

> On Monday 10 August 2009, Jim Bouldin wrote:
> > Can anyone recommend a package that can calculate the distances between
> > points (either all or a defined sample of) for x,y point locations
> listed
> > in long format?  Thanks in advance.
> >
> 
> Sure. How about the function dist():
> 
> d <- data.frame(x=sample(1:10, 5), y=sample(1:10, 5))
> 
> dist(d)
>          1        2        3        4
> 2 3.605551                           
> 3 6.403124 7.071068                  
> 4 9.219544 7.211103 5.830952         
> 5 8.062258 5.099020 7.211103 3.162278
> 
> 
> Cheers,
> Dylan
> 
> 
> -- 
> Dylan Beaudette
> Soil Resource Laboratory
> http://casoilresource.lawr.ucdavis.edu/
> University of California at Davis
> 530.754.7341
> 

Jim Bouldin, PhD
Research Ecologist
Department of Plant Sciences, UC Davis
Davis CA, 95616
530-554-1740