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

Exactly what I was looking for. Thank you very much. Jim > Jim Bouldin writes: > > > 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

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

t;- data[data$V3 >0,] #remove the distance to self > > > hope this solves it. > > Kami > > > Jim Bouldin wrote: > > Last message got truncated somehow. To repeat, I forgot to mention that > I > > need to get the distances into the following format. Usin

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

Last message got truncated somehow. To repeat, I forgot to mention that I need to get the distances into the following format. Using Dylan's example above: Point Pair Distance 1-2 3.6 1-3 6.4 1-4 9.2 . . . . 3-4 .

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

> Sure. How about the function dist(): > > d <- data.frame(x=sample(1:10, 5), y=sample(1:10, 5)) > > dist(d) > 1234 > 2 3.605551 > 3 6.403124 7.071068 > 4 9.219544 7.211103 5.830952 > 5 8.062258 5.099020 7.211

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

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

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

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

[R-sig-Geo] statistical tests under spatial autocorrelation

I cannot seem to find any packages/functions that take spatial autocorrelation into account , by whatever method, when performing statistical tests. Any pointers appreciated. Thanks Jim Bouldin, PhD Research Ecologist Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740

[R-sig-Geo] replying to messages at R-sig-Geo

Roger, thank you for your reply to my post--that is very much along the lines of what I am looking for. I cannot seem to figure out how to reply to messages properly in thresds, so I am copying and pasting into my email program, but surely there is a simpler way? Thanks. Jim Bouldin

[R-sig-Geo] Spatial Clustering in R

se points. Jim Hi Jim, What are the nature of the attributes of the items, are they simply actually distances from one another, or is their some other measures of similarity/dissimilarity (say differences in soil types)? Dan Putler On Tue, 2008-10-28 at 13:35 -0700, Jim Bouldin wrote: > I&#

[R-sig-Geo] Spatial Clustering in R

cally correct term for what I have just described, but I don't know it. Thanks. Jim Bouldin, PhD Associate in Agricultural Experiment Station Department of Plant Sciences, UC Davis Davis CA, 95616 530-554-1740 ___ R-sig-Geo mailing list