search for: torus

Dear R users. I have data observed on the surface of a torus, and am trying to fit the nonlinear regression using the geodesic equation on a torus. Could anyone give me a helpful advise on this problem? I would definitely appreicate your reply. Sincerely, SUNGSU KIM [[alternative HTML version deleted]]

...whether it is active or not. Specific error messages when trying to mount.cifs: "“Credential formatted incorrectly: (null) ” and “Unable to find suitable address.” The second message is more common than the first. The details: Production environment, trying to install a new server, named torus. Server: torus locally is 192.168.0.203; its tun is 10.8.20.1. Runs Ubuntu 14.04 lts. Clients: fire is local client at 192.168.0.6; its tun on torus is 10.8.20.5. wind is remote client with tun on torus at 10.8.20.13. air locally is 192.168.0.212, and its tun address for torus is 10.8.20.21....

Hallo I am going through the paper on Torus randomization by Kyle E. Harms torus randomization is an alternative to Chi-sq test of Independence When the assumption of independence within the groups is violated i want to know that Is there any library regarding torus randomization Someone said me that its in Utility.r but i could not find ou...

...> > Specific error messages when trying to mount.cifs: "“Credential > formatted incorrectly: (null) ” and “Unable to find suitable address.” > The second message is more common than the first. > > The details: > Production environment, trying to install a new server, named torus. > > Server: torus locally is 192.168.0.203; its tun is 10.8.20.1. Runs > Ubuntu 14.04 lts. > > Clients: > fire is local client at 192.168.0.6; its tun on torus is 10.8.20.5. > > wind is remote client with tun on torus at 10.8.20.13. > > air locally is 192.168.0.212, a...

Hello, I have 2D-data on a torus, i.e. they are scattered within [0:2pi) and are supposed to be periodic with period 2pi. Is there a way in R for a kernel density estimation for such data? I found this article http://www.dmqte.unich.it/personal/dimarzio/density46.pdf but a) I don't fully understand the article (my knowledge...

...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(...) function that I wrote myself. VMuncorrected is the voronoi mosaic that is not toroidally edge corrected VMcorrected is the voronoi mosaic that is toroidally edge corrected >treemap = read.table('af1.txt', sep = "\t", header = 1) >VMuncorrected = voronoi.mosaic(tre...

Dear Dr. Bivand and R-users, I have a 5 by 5 grid, say, location[1:5,1:5], and I want to know the indices of 8 neighbours of each cell. For example, for location[2,2], its neighbour coordinates are [1,1:3], [2,1], [2,3] and [3,1:3]. Sometimes I also need to remove edge effects (torus = TRUE). I have tried "cell2nb" function in your spdep package. Here's my example: > neigh <- cell2nb(5,5,type="queen",torus=T) > neigh Neighbour list object: Number of regions: 25 Number of nonzero links: 200 Percentage nonzero weights: 32 Average number of li...

Hi all, I'm currently implementing quasi random generation (torus) on R (package randtoolbox available on CRAN). Even if it is not a great idea, I decided to use the machine time to initiate the seed. So when the seed is not specified by the user, the pkg uses the time machine time. Hence the following R code should produce different uniform variates :...

Hi all, I am sorry if this is a very basic quesion, but I have no experience with analyzing spatial data and could not find the right function/package quickly. Any hints would be much appreciated. I have a matrix of spatial point patterns like the one below and want to find the number of independent components (if that's the right term) in that matrix (or in that image). x=matrix(c(0,1,0,0,0,

...ed i.i.d. uniformly in the unit square; (b) then m,say 100, daughters are assigned i.i.d. uniformly to these parents and such that each daughter is located i.i.d. uniformly in a disk of radius r = 0:1 centred at her parent, under the periodic boundary conditions, i.e. the square is converted into a torus. I tried some but can not figure out the whole thing. Thank you very much for your time. Yours Wolfgang Amadeus [[alternative HTML version deleted]]

Hi list, I am using read.csv to read data from csf files, but noticed that the numeric data (those larger than 10 power 9) are rounded to the nearest million (10 power 6). Any solution? Thanks Arvin -- Sent from my mobile device

Here is the patch with my changes. Most work went into the decoder. I just changed on the encoder if something was nessesary to build the library. You can find the patch here (quite big).. http://torus.untergrund.net/code/theora_mmx_vc2005.diff Please let me know if the encoder works without problems. I just did a very brief testing of it. The decoder has been tested against the test files from http://v2v.cc/~j/theora_testsuite/ . I compared the dumpvid output against my version and it looks...

...nts) that are distributed i.i.d. uniformly in the unit square; (b) then n daughters are assigned i.i.d. uniformly to these parents and such that each daughter is located i.i.d. uniformly in a disk of radius r = 0:1 centred at her parent, under the periodic boundary conditions (i.e. the square = a torus). My attempt so far is: set.seed(1) library(spatstat) n_parent <- 2 n_daughter <- 4 r = 0.1 cnt <- n W <- disc(radius=3, centre=c(0,0)) i <- 1 while(i <= n_daughter){ d_x <- runif(1) d_y <- runif(1) if (d_x ^2+d_y^2 <r) { i = i+1}} #need a condition he...

Dear R helpers, I have a data set with 4 types (W, C, E & S). Now I have values for all types plus all possible combinations (the order is unimportant): W, C, WC, E, WE, CE, WCE, S, WS, CS, WCS, ES, WES, CES & WCES. Ideally I would like to represent everything in one graph and as concise as possible. Drawing 4 circles and depicting it as overlap just gives me 13 out of the 15

Dear useRs, I'd like to announce a new package called geozoo, short for geometric zoo. It's a compilation of functions to produce high-dimensional geometric objects, including hypercubes and hyperspheres, Boy's surface, the hyper torus and a selection of polytopes. For a complete list, as well as images and movies, visit http://streaming.stat.iastate.edu/~dicook/geometric-data/<http://streaming.stat.iastate.edu/%7Edicook/geometric-data/> . This package makes extensive use of GGobi (http://ggobi.org) and the rggobi package...

...st.tif") mask<-extent(file, 1, 50, 1, 50) subset<-crop(file,mask,test.tif", overwrite=TRUE) value <- as.matrix(subset) # Creation of a list of integer vectors giving the region id numbers for the neighbors within the grid extent nb <- cell2nb(50, 50, type="queen", torus=TRUE) # Calculation of the distances along the links in the neighbous list dist <- nbdists(nb, coordinates(subset), longlat=TRUE) # Converting the distances to inverse distance values inv.dist <- lapply(dist, function (x) 1/(x*100)) # Supplementing the neighbors list with spatial weights f...

Hi List, I have used XML in R version 2.9.2. The code is working fine using Rv2.9.2 and its related XML package. Now I am using Rv2.13.1 and its related XML package, but I get the following error: Error in UseMethod("xmlName", node) : no applicable method for 'xmlName' applied to an object of class "NULL" Any idea? Thanks Arvin [[alternative HTML version

...d i.i.d. uniformly in the unit square; > > (b) then n daughters are assigned i.i.d. uniformly to these parents and such > that each daughter is located i.i.d. uniformly in a disk of radius r = > 0:1 centred at her parent, under the periodic boundary conditions (i.e. the > square = a torus). > > > My attempt so far is: > > > set.seed(1) library(spatstat) > > n_parent <- 2 > > n_daughter <- 4 > > r = 0.1 > > cnt <- n > > W <- disc(radius=3, centre=c(0,0)) i <- 1 > > while(i <= n_daughter){ > > d_x <- r...

Hi again, I measured my fragment reconstructions against the compiler output from GCC and well - the new codes perform better, so I brushed up my gcc inline assembler skills and made a port. Code is here: http://torus.untergrund.net/code/mmxfrag.c All routines perform much better now. Inter2 alone got a speedup of factor 5 on Pentium-M. Athlon CPU's execute roughly 3 times faster. Hadn't had the chance to benchmark core2 though. It would be nice to hear if the code compiles on 64bit intel. Regardin...

Dear list useRs, I have to generate a random set of coordinates (x,y) in [-1 ; 1]^2 for say, N points. At each of these points is drawn a circle (later on, an ellipse) of random size, as in: > N <- 100 > > positions <- matrix(rnorm(2 * N, mean = 0 , sd= 0.5), nrow=N) > sizes<-rnorm(N, mean = 0 , sd= 1) > plot(positions,type="p",cex=sizes) My problem is to