similar to: Combinations

Hi, all. Given an array, I'd like to add elements whose location vectors are permutations of one another. For example, in a 3-dimensional array, I'd add the elements in positions (1,2,3), (1,3,2), (2,1,3), (2,3,1), (3,1,2) and (3,2,1); those in positions (1,2,4), (1,4,2), (2,1,4), (2,4,1), (4,1,2), and (4,2,1); and so on. Elements with repeated positions -- (1,1,2) or (1,4,4), for

I have a set data={A,B,C,D,E,F,G} I want to choose 2 letter from 8 letters, i.e. generate the combination set for choose 2 letters from 8 letters. I want to get the liking: combination set={AB,AC,AD,....} Does anyone konw how to do in R. thanks, Aimin

Hi! Suppose I have m objects. I need to find out what are all possible ways I can group those m objects into r groups. Moreover, I need to create a matrix that contains what those arrangements are. I've created code for when r=2 but I've come to a halt when trying to generalize it into r groups. For example, if I have m=6 objects and I want to arrange them into groups of r=2, there

Hello all, For presentation and printing purposes I'd like to be able to open a new window device and write text and/or include an object (mostly matrices or lists). I've tried around windows(), but which I'd expect to work doesn't: windows(text(results)), or windows(parse("Final result:",results)) -"results" is a numeric object-. Thanks for any help, Alex

Is there an "execute" command such that: execute(paste("X[3]<-5")) or execute(paste("anything")) where "anything" is executed by R?? Thanks, Alex Ahgarin ________________________________________________________________ Data Management ISC Inc. Washington, DC. ----------------------------------------------- FREE! The World's Best Email Address

Hi How do I generate all ways of ordering sets of indistinguishable items? suppose I have two A's, two B's and a C. Then I want AABBC AABCB AACBC ABABC . . .snip... BBAAC . . .snip... CBBAA [there are 5!/(2!*2!) = 30 arrangements. Note AABBC != BBAAC] How do I do this? -- Robin Hankin Uncertainty Analyst National Oceanography Centre, Southampton European Way, Southampton SO14

I can think of many brute-force ways to do this outside of R, but was wondering if there was a simple/elegant solution within R instead. I have a table that looks something like the following: Factor1 Factor2 Value A 11/11/2009 5 A 11/12/2009 4 B 11/11/2009 7 B 11/13/2009 8 >From that I need to generate all permutations of Factor1 and Factor2 and force a 0 for any combination that doesn?t

Neils Waller asks > -----Original Message----- > From: niels Waller [mailto:niels.waller at home.com] > Sent: Sunday, 17 December 2000 8:31 > To: r-help at stat.math.ethz.ch > Subject: > > Does anyone know of an R (or S-PLUS) function for delineating > all possible combinations and permutations? > > That is, for set (1,2,3) 3_C_2 = {1,2} {1,3} {2,3} >

Dear all, I am doing 200 times simulation. For each time, I generate a matrix and define some function on this matrix to get a 6 dimension vector as my results. As the loop should be slow, I generate 200 matrice first, and save them into a list named ma, then I define zz<-sapply(ma, myfunction) To my surprise, It almost costs me the same time to get my results if I directly use a loop

Dear all, I am doing 200 times simulation. For each time, I generate a matrix and define some function on this matrix to get a 6 dimension vector as my results. As the loop should be slow, I generate 200 matrice first, and save them into a list named ma, then I define zz<-sapply(ma, myfunction) To my surprise, It almost costs me the same time to get my results if I directly use a loop

Hello all, I am trying to create a matrix of 1s and -1s without any repetitions for a specified number of columns. e.g. 1s and -1s for 3 columns can be done uniquely in 2^3 ways. -1 -1 -1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 1 and for 4 columns in 2^4 ways and so on. I finally used the function combn([0 1],3) that I found at the following link

Dear Greg, Thanks for the new release. The decomposition of the SSQ is just what I need! Regards, Martin. Martin Hoyle, School of Life and Environmental Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK Webpage: http://myprofile.cos.com/martinhoyle >>> gregory_r_warnes at groton.pfizer.com 10/30/02 07:16PM >>> Version 0.7.3 of the gregmisc package

OK, this has to be simple but I've searched through help files, mailing list archives and well, everything I could think of, and still no luck. I simply want to change the x axis labels in a time series graph, from its default numbering (which starts at 1 and increments by 1), to values I have in another vector, "Year". It has to be a time series graph, I don't want to have to

Hi all, I´ve been ill and I have lost a lot of time without seen the pc. I want you to help if you can if you want. Only I need an initial guide. I´ve been out a lot of time and I need a hope. Is only for "joby" purposes. The problem: I want to simulate each of the posible combination in a play. Imagine they play to games (football games) and you can choose "1",

Hi, Given a function fun <- function(a, b) a + b how do I generate the function 'function(x, y) x + y'? Working from the help files and Bill Venables' R-news article (June 2002), I have tried various permutations with substitute without success. e.g. do.call("substitute", list(fun, list(a = as.name("x"), b = as.name("y")))) Regards, John.

Version 0.6.0 of the gregmisc package has just been released on CRAN. Description: =========== Package: gregmisc Description: Misc Functions written/maintained by Gregory R. Warnes Title: Greg's Miscellaneous Functions Version: 0.6.0 Date: 2002/09/23 Maintainer: Gregory R. Warnes <Gregory_R_Warnes at groton.pfizer.com> Author: Gregory R. Warnes. Includes code provided by Ben

Version 0.6.0 of the gregmisc package has just been released on CRAN. Description: =========== Package: gregmisc Description: Misc Functions written/maintained by Gregory R. Warnes Title: Greg's Miscellaneous Functions Version: 0.6.0 Date: 2002/09/23 Maintainer: Gregory R. Warnes <Gregory_R_Warnes at groton.pfizer.com> Author: Gregory R. Warnes. Includes code provided by Ben

I would appreciate any suggestions on which function to use to write subsequent functions analysing combinations of treatments. This refers to experimental trials of medical treatments. I want to write routines to analyse various comparisons (combinations) So .... if 5 treatments are available (t01, t02, t03, t04 and t05) I want to write a general routine that works out all possible

Hola a tod en s, tengo una duda que se relaciona con alternativas al uso de variables globales. En principio, si se quiere usar un generador de v.a con la librería Runuran sólo se permite definir las funciones de densidad (o el núcleo de las mismas) con funciones con un único argumento en (x). Sin embargo, necesito pasar a las funciones más argumentos que van cambiando en las iteraciones de

Hi R users I try to use the lme but I can?t!!!!! My script is (some words in french, sorry!!): rm(list=ls(all=TRUE)) #Efface tous les objets en m?moire pour ?viter des erreurs library(MASS) #Chargement des Librairies library(car) library(Hmisc) library(tkWidgets) library(svDialogs) library(multtest) library(nlme) #Rep <- "C:/Documents and Settings/U3M/Bureau/steph/Scripts