search for: voronoi

Hi all, I am running R 2.5.0 under Windows XP Media Center Edition. Here's a problem that's been stumping me for a few days now, and I can't find anything useful in the archives. I am using voronoi.mosaic (tripack package) to create proximity polygons for a study of vegetation competition and dynamics. The points lists are read in from a file for each plot, then 8 duplicates are translated around the edges of the plot (Toroidal edge correction). This is completed using the torus(...) f...

...tripack, seems the most mature package for this. Got it to work well with their test data set - data(tritest). When i tried random numbers to explore further, i am getting some results that don't reconcile. example run this: library(tripack) y <- runif(100) x <- runif(100) vm <- voronoi.mosaic(x,y) plot(vm) par(new=T) plot(x,y,col='blue') when you look at the plot of the mosaic overlayed with the raw data, the mosaic should have each data point in 1 cell, however that is not the case - any help would be appreciated. However if you run data(tritest) x <- tritest$x...

Hello list, I'm just getting started with using R - I have been trying over the past day or so to work out a method for generating voronoi polygons for PostGIS using SQL. I was able to put together a procedure which works relatively well, but is somewhat inefficient. Someone on the PostGIS list pointed me to the deldir() function in R, for which I can export a text file with x/y coordinates from a PostGIS table, and write an SQL scr...

I would like to create a voronoi map that can show me point values like the ones in colum street_cle. I was able to do it in tileplot(latticeExtra) like the ones attached, and with the following commands: xy=list(x=x2$X, y=x2$Y) xy$street_cle <- x2$street_cle tileplot(street_cle~ x*y, xy) But this is a trellis. Is it possi...

Hello. I'd like to convert voronois object created by tripack to polygons to use them in GIS(Geographic Information Systems) software. I tried to create voronoi objects by using following code. > library(tripack) > x <- rnorm(10) > y <- rnorm(10) > plot(x,y) > v<-voronoi.mosaic(x,y) > plot(v) But from...

Hello everyone I have a problem with tripack package, I want to perform a Voronoi tessellation on a specific domain (I have the shape file), in order to weight my climatic data with the area ... How Can I do it? Thank you very much Andrea

Dear R-users, Does anyone know how to do weighted Voronoi diagrams (Dirichlet tesselation) in R? To be more specific, I have a set of coordinates for tree locations on a plot, and I'm looking for a way to do the tesselation so that the polygon size for each tree depends on the size of the subject tree, and the size of its neighbors. So, the locati...

There's Renka's STRIPACK, and TRIPACK, respectively, ACM TOMS Algorithms 772 and 751, and there's the R package "deldir" which does the Delaunay for a plane, but does anyone have or know of the tessellation in R for a sphere? Also, is there a standard indexing scheme for Delaunay facets, and perhaps of edges in such facets? I'd expect that to be a publication reference,

Is there any pure r code to do delaunay or voronoi diagrams? Thanks! --------------------------------- [[alternative HTML version deleted]]

hi all members, please, i need you help... now a i´m working with veronoi polygons in a area with projections, but i need cut the polygons left. On other words, i need cut the polygons in the worked area. R help say that use the command voronoi.findrejectsites, but in this command i need put the numbers, any way...this command not cut!! do you can help me? Thank you for help me! José Bustos Master Stat Program Universidad de Concepción Chile jbustosm@udec.cl, jbutosmelo@yahoo.es --------------------------------- [[altern...

...int about the release > script. I read the mail from Tom 2 days ago, and forgot that the script was > available in the tag / branch when I acted today :( > > I uploaded clang+llvm-3.4.1-rc1-x86_64-unknown-ubuntu12.04.tar.xz to > ftp.llvm.org. > > All tests are OK but: > - voronoi (usual failure: not a regression) I do not see this failure in my regular test suite builds after my for to voronoi in 196186. Did you use the latest test-suite version? Tobias

Hi, I've been looking for functions that can do delaunay tesselation and generate voronoi cells. I came across deldir and tripack but both seem to be restricted to 2D points. Are there any packages that can do a tesselation in N dimensions? I know that Matlab and Mathematica use the qhull package to provide functions for this. Does anybody know of any R packages that do this (maybe by c...

Buenas! Estoy intentando hacer un trabajo con mapas y llegué a un punto en el que me atasco: Quiero generar el dibujo de un mapa. A ese mapa después le señalaría unos puntos y en, base a esos puntos, dividiría el mapa en secciones (usando diagramas Voronoi, que creo que sabría hacerlo, por más que todavía me quedan raro) Todavía lo que sé hacer es muy ínfimo (marcar puntos y etiquetar con leaflet y poco más), por lo que me podrían parecer bien soluciones muy diversas, que incluyen cambiar de paquetes (en vez de maptools alguna otra), siempre y cuand...

...barjatu trebezi falta Carlos Ortega <cof en qualityexcellence.es> igorleak hau idatzi zuen (2019 mar. 19, ar. 23:13): > Hola, > > No sé si esto seguirá siendo vigente, con los cambios en las APIs de > Google... > > > https://stackoverflow.com/questions/12156475/combine-voronoi-polygons-and-maps > > Saludos, > Carlos Ortega > www.qualityexcellence.es > > El mar., 19 mar. 2019 a las 22:58, Juan Abasolo (<juan.abasolo en ehu.eus>) > escribió: > >> Buenas! >> Estoy intentando hacer un trabajo con mapas y llegué a un punto en el que &...

...MultiSource/Applications/ClamAV MultiSource/Applications/lemon MultiSource/Applications/obsequi MultiSource/Benchmarks/MiBench/automotive-bitcount MultiSource/Benchmarks/MiBench/telecomm-FFT MultiSource/Benchmarks/Olden/voronoi MultiSource/Benchmarks/Ptrdist/anagram SingleSource/Benchmarks/BenchmarkGame Everything is built off trunk. Has anyone else seen these failures and found a fix? Perhaps I'm missing a dependency? There doesn't appear to be a linux machine on llvm.org/perf to compare...

...MultiSource/Applications/lemon/lemon.execution_time (496 of 986) FAIL: MultiSource/Benchmarks/MiBench/automotive-bitcount/automotive-bitcount.exec ution_time (497 of 986) FAIL: MultiSource/Benchmarks/MiBench/telecomm-FFT/telecomm-fft.execution_time (498 of 986) FAIL: MultiSource/Benchmarks/Olden/voronoi/voronoi.execution_time (499 of 986) FAIL: MultiSource/Benchmarks/Ptrdist/anagram/anagram.execution_time (500 of 986) FAIL: SingleSource/Benchmarks/BenchmarkGame/puzzle.execution_time (501 of 986) Notice how the test numbers are consecutive (494-501). They all pass when Burg passes. paul On 2013...

...e execution failures) >MultiSource/Applications/Burg >MultiSource/Applications/ClamAV >MultiSource/Applications/lemon >MultiSource/Applications/obsequi >MultiSource/Benchmarks/MiBench/automotive-bitcount >MultiSource/Benchmarks/MiBench/telecomm-FFT >MultiSource/Benchmarks/Olden/voronoi >MultiSource/Benchmarks/Ptrdist/anagram >SingleSource/Benchmarks/BenchmarkGame > >Everything is built off trunk. > >Has anyone else seen these failures and found a fix? Perhaps I'm missing >a dependency? There doesn't appear to be a linux machine on llvm.org/perf >to...

...was scrubbed... Name: pastedGraphic.pdf Type: application/pdf Size: 29990 bytes Desc: not available Url : https://stat.ethz.ch/pipermail/r-help/attachments/20060418/6b1b37c4/attachment-0003.pdf -------------- next part -------------- Variable j has k_j levels, and after we are done we can make a Voronoi diagram (using the deldir package) of the k_j points y_{jl}. Maximizing the likelihood means trying to make sure each of the x_i is in the "correct" Voronoi cell, i.e. the Voronoi cell corresponding with the category of variable j that i was in (i.e. for which g_{ijl}=1). This general...

Hi all, Given a number of points (x,y) in a plane, I'd like to plot a map of polygons, so that 1) each polygon contains exactly one point 2) the polygon defines the area for which this specific point is closer than any other point. It's a bit like a map of areas "influenced" by that point, and it's obviously a matter of intersecting the perpendicular bisectors

...11983 2483 137 | 223 408 968 27 | bisort/bisort | 2.86 0.0800 0.0332 0.0046 0.0163 0.0002 0.0002 | 3825 914 148 | 17 64 * * | em3d/em3d | 2.84 0.0600 0.0569 0.0034 0.0195 0.0003 0.0002 | 3005 727 406 | 32 79 58 1 | voronoi/voronoi | 1.11 0.1900 0.0601 0.0081 0.0755 0.0024 0.0009 | 8676 2205 322 | 141 275 761 38 | health/health | 0.97 0.0800 0.0298 0.0036 0.0171 0.0004 0.0002 | 3438 823 268 | 35 49 101 6 | perimeter/perimeter | 0.64 0.0800 0.0307 0.0040 0.014...