deldir() uses Lee and Schacter's algorithm, while the geometry package is a (partial) implementation of Barber et. al's Quickhull. Since both algorithms are correct, they should give the same results for the same data.
How about you post a small input dataset and list the output that you need... B. On 2014-05-20, at 2:04 PM, Raphael Päbst wrote: > Thank you very much, this looks promising. > > I have a follow-up question however, probably due to my thickness when > it comes to the underlying math. > > I am translating (as closely as possible) some code that has > originally been written for Mathlab and uses the delaunay() function > there. Now, if I understand it correctly, Mathlab uses the same > Qhull-Library as a basis, as does the Geometry-Package. So in theory > delaunay(x) in Mathlab and delaunay(x) in R should give me the same > results for the same x, where x is a matrix of coordinates. > > If I use deldir(x1, x2) where x1 and x2 are the first and second > column of that same matrix above, is there any chance to get the same > result as with delaunayn() or at least something similar in format to > the result of delaunayn()? > > Many thanks again and please excuse my crude english. > > Raphael > On 5/14/14, Boris Steipe <boris.ste...@utoronto.ca> wrote: >> Try: >> >> install.packages("deldir") >> library(deldir) >> ?deldir >> set.seed(16180) >> x <- runif(20); y <- runif(20); window <- c(0,1,0,1) >> tess <- deldir(x, y, rw = window) >> plot.deldir(tess, wpoints="real", wlines="tess") >> >> Cheers, >> Boris >> >> >> On 2014-05-14, at 8:18 AM, Raphael Päbst wrote: >> >>> Hello everyone! >>> I have returned to R after a longish break and am currently working on >>> a project where I need Delaunay-Triangulations and Voronoi-Diagrams. >>> If I understood it correctly, the Geometry-Package only offers >>> functions for the Delaunay-Triangulation at the moment. Is this >>> correct and if so, what would be the best way to get Voronoi-Diagrams >>> as well? >>> >>> Many Thanks in advance! >>> >>> Raphael >>> >>> ______________________________________________ >>> 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. >> > > ______________________________________________ > 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.