Grokbase Groups R r-help April 2008

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793 discussions - 2,497 posts

  • I realize the R developers are probably overwhelmed and have little time for this, but the documentation really needs some serious reorganizaton. A good through description of basic variable types ...
    Beck, Kenneth (STP)Beck, Kenneth (STP)
    Apr 21, 2008 at 9:56 pm
    Apr 28, 2008 at 4:57 pm
  • I am switching from Matlab to R, but I found that R is 200 times slower than matlab. Since I am newbie to R, I must be missing some important programming tips. Please help me out on this. Here is the ...
    Zhandong LiuZhandong Liu
    Apr 30, 2008 at 8:15 pm
    May 2, 2008 at 3:27 pm
  • Hi all, I would like to make a 2-by-2 comparison of intercepts and slopes from linear regression models. Can you advise me on that? All the best, Diogo André Alagador
    Diogo André AlagadorDiogo André Alagador
    Apr 1, 2008 at 8:01 am
    Apr 13, 2008 at 11:32 pm
  • Hello, I am new useR, I have written some functions, which I currently use by "source"-ing them from the files. That's OK, but when I my functions start counting in the tens and hundreds I'd be glad ...
    Tribo LaboyTribo Laboy
    Apr 7, 2008 at 6:13 am
    Apr 8, 2008 at 2:07 pm
  • Hi R, A quick question: How do we find the number of words in a string? Example: C="Have a nice day" And the number of words should be 4. any built in function or?... Thanks, Shubha Shubha Karanth | ...
    Shubha Vishwanath KaranthShubha Vishwanath Karanth
    Apr 9, 2008 at 3:20 pm
    Apr 10, 2008 at 6:31 am
  • I am using R 2.4.1 with Windows XP. I use the plot command in a fairly simple script and I use the right mouse click on the plot and save as a postscript file. I used the resultant file in a paper ...
    Chris WalkerChris Walker
    Apr 26, 2008 at 7:30 pm
    Jan 8, 2009 at 10:54 am
  • Hi everybody, I am trying to make my mind about the use of R for Computational and Statistical Approaches to Genomics. I know this is a vaste field: this is the main reason why I am sending this ...
    [Ricardo Rodriguez] Your XEN ICT Team[Ricardo Rodriguez] Your XEN ICT Team
    Apr 29, 2008 at 7:23 am
    May 2, 2008 at 8:57 am
  • I've rolled up R-2.7.0.tar.gz a short while ago. This is a development release which contains a number of new features. Also, a number of mostly minor bugs have been fixed. See the full list of ...
    Peter DalgaardPeter Dalgaard
    Apr 22, 2008 at 8:16 am
    Apr 25, 2008 at 8:09 am
  • Hi all, I've read the R for windows FAQ and am a little confused re: memory.limit and memory.size to start using R 2.6.2 on WinXP, 2GB RAM, I have the command line "sdi --max-mem-size 47M" Once the ...
    Dave DepewDave Depew
    Apr 16, 2008 at 2:59 pm
    Apr 19, 2008 at 9:16 pm
  • Dear all, how can I plot a line graph and a bar graph in one single figure? I tried to combine "barplot" and "plot". Even though they both have the same x-values (1 to 55), it just doesnt look as if ...
    Anne-Katrin LinkAnne-Katrin Link
    Apr 10, 2008 at 1:18 pm
    Apr 14, 2008 at 6:02 pm
  • Another possibly simple thing that I cannot get right is how to extract the data part of a list as a matrix. The data were read from xls, with labels, and thus are of list mode, e.g., col1 col2 1 0.1 ...
    Olivier LefevreOlivier Lefevre
    Apr 24, 2008 at 10:02 pm
    Apr 28, 2008 at 8:45 am
  • Hi, I have a frame "treat" and want to find matched pairs in the data frame "control". In the matched (combined) data frame there should be two variables (0/1),indicating the "source" of the data ...
    Apr 13, 2008 at 6:41 pm
    Apr 21, 2008 at 6:32 am
  • Hi all, I have count data (number of flowering individuals plus total number of individuals) across 24 sites and 3 treatments (time since last burn). Following recommendations in the R Book, I used a ...
    Wade WallWade Wall
    Apr 2, 2008 at 4:03 pm
    Apr 3, 2008 at 1:11 pm
  • I have problems with emf files because OpenOffice does a poor job at importing figures in this format. On the other hand, imported eps figures are not displayed, just printed. Is there any R graphic ...
    Agustin LoboAgustin Lobo
    Apr 16, 2008 at 11:20 am
    Apr 17, 2008 at 4:10 pm
  • Hi all, I have not been able to find an answer to what is a simple question: conaguaMexicoSub <- subset(conagua, unidad == "Jalapa", select = c(equipo,X101:X309)) This subset gives me all the rows ...
    [Ricardo Rodriguez] Your XEN ICT Team[Ricardo Rodriguez] Your XEN ICT Team
    Apr 15, 2008 at 12:10 am
    Apr 16, 2008 at 12:45 pm
  • Dear all, I haven't seen this mentioned and presumably Dr. Deepayan Sarkar is too polite to advertise! I just received a flyer from Springer: A new book on Lattice released today!! ...
    Mark WardleMark Wardle
    Apr 30, 2008 at 8:51 pm
    Jun 4, 2008 at 7:57 pm
  • Hello R users, I am trying to estimate the parameters of a bimodal normal distribution using moments matching, so I have to solve a non-linear system of equations. How can I solve the following ...
    Radka PanchevaRadka Pancheva
    Apr 25, 2008 at 8:33 am
    Apr 27, 2008 at 7:10 am
  • Hi the list, Considere the following: f <- function(x){apply(x,2,mean)} findGlobals(f) findGlobals consideres mean as a global variable, which it is not. Is there a way to tell to findGlobals that ...
    Christophe GenoliniChristophe Genolini
    Apr 7, 2008 at 10:24 pm
    Apr 8, 2008 at 11:08 pm
  • Colleagues, I have some text: TEXT <- c("a", "bb;ccc", "dddd;eeeee;ffffff") I want to retrieve the portion of each element before the first semicolon. I can split each element using strsplit: SPLIT ...
    Dennis FisherDennis Fisher
    Apr 11, 2008 at 11:12 am
    Jun 1, 2010 at 2:20 pm
  • I am facing problem in installing the R package on linux . When i put the command install.packages("BART") Then it asks for selecting the mirror , i have selected the mirrror , but it is showing no ...
    Apr 18, 2008 at 5:49 am
    Jun 3, 2008 at 8:09 pm
  • Hi, here comes my problem, say I have the following functions (example case) #------------------------------------------------------------ function1 <- function (x, theta) {a <- theta[1] ( 1 - ...
    Apr 22, 2008 at 6:40 pm
    May 30, 2008 at 5:56 pm
  • I need to use R to model a large number of experiments (say, 1000). Each experiment involves the random selection of 5 numbers (without replacement) from a pool of numbers ranging between 1 and 30 ...
    Apr 29, 2008 at 12:52 pm
    Apr 30, 2008 at 1:25 pm
  • Dear All, I have a list of models(1000) which have variable scores from 20 different method. I would like to rank models using consensus approach based on high scores from different methods.Is there ...
    Mallika VeeramalaiMallika Veeramalai
    Apr 17, 2008 at 11:09 pm
    Apr 22, 2008 at 7:07 pm
  • Hi, Design isn't strictly an R base package, but maybe someone can explain the following. When lrm is called within a function, it can't find the dataset dd: + { + d <- data.frame(ch, age) + dd <- ...
    Gad AbrahamGad Abraham
    Apr 17, 2008 at 5:24 am
    Apr 22, 2008 at 6:17 am
  • This email isn't asking for assistance, but I thought R-help readers would find it interesting. This week we offered a half-day introduction to R for researchers at Augsburg University. The response ...
    Antony UnwinAntony Unwin
    Apr 12, 2008 at 12:50 pm
    Apr 19, 2008 at 8:20 am
  • Hello all, I should probably know this by now... Anyway: I have a large matrix (dim(data) is 3000 18000). In each element are one of the following character strings "0/0", "1/1", "1/2", "2/2". I ...
    Matthew KellerMatthew Keller
    Apr 16, 2008 at 7:52 pm
    Apr 18, 2008 at 6:18 pm
  • Hi all, In Spanish vowels with accent like ?, ?, ... doesn't affect to the alphabetical order of vector of strings. I mean, a or ? don't matter for establishing the alphabetical order. Nevertheless, ...
    [Ricardo Rodriguez] Your XEN ICT Team[Ricardo Rodriguez] Your XEN ICT Team
    Apr 15, 2008 at 2:38 pm
    Apr 16, 2008 at 1:29 pm
  • Dear all, Can I do a permutation test if the number of individuals in one group is much bigger than in the other group? I searched the literature but I didin´t find any assumption that refers to this ...
    João FadistaJoão Fadista
    Apr 8, 2008 at 1:17 pm
    Apr 10, 2008 at 4:23 pm
  • I am reading some documentation about Cross Spectrum Analysis as a technique to compare spectra. My understanding is that it estimates the correlation strength between quasi-periodic structures ...
    Maura E MonvilleMaura E Monville
    Apr 30, 2008 at 12:54 am
    Sep 2, 2010 at 7:17 am
  • Respected R experts, I am trying to apply a user function that basically calls and applies the R loess function from stat package over each time series. I have a large matrix of size 21 X 9000000 and ...
    Sudipta SarkarSudipta Sarkar
    Apr 29, 2008 at 7:16 pm
    Apr 30, 2008 at 1:42 pm
  • 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: My ...
    baptiste Auguiébaptiste Auguié
    Apr 26, 2008 at 10:22 am
    Apr 27, 2008 at 11:46 am
  • Hey all, The code below creates a partial dependence plot for the variable x1 in the linear model y ~ x1 + x1^2 + x2. I have noticed that the for loop in the code takes a long time to run if the size ...
    Mike DugasMike Dugas
    Apr 23, 2008 at 7:42 pm
    Apr 24, 2008 at 2:24 pm
  • Hi all, I have been trying to obtain confidence intervals for the fit after having used lmer by using intervals(), but this does not work. intervals() is associated with lme but not with lmer(). What ...
    Kedar nadkarniKedar nadkarni
    Apr 20, 2008 at 6:31 pm
    Apr 23, 2008 at 3:14 pm
  • Hello!!! I have been read a much about as read data from Excel File, but I haven?t found the necesary information to read the data. Now, I can create a channel : channel <- ...
    Apr 19, 2008 at 10:06 pm
    Apr 21, 2008 at 6:54 pm
  • I've used optim to analyze some data I have with good results, but need to correct the var-cov matrix for possible effects of clustering of observations (respondents) in small groups ...
    Peter MuhlbergerPeter Muhlberger
    Apr 10, 2008 at 12:15 am
    Apr 14, 2008 at 10:57 pm
  • I am converting some matlab code into R that use inverse of the complementary error function, erfcinv and did not find an equivalent in R, is there such a function in some contributed modules? Thanks.
    Apr 13, 2008 at 9:20 pm
    Apr 14, 2008 at 1:14 pm
  • Dear R-Help, I am working on a paper in an R course for large file support in R using scan(), relational databases, and XML. I have never used SQL or heirarchical document formats such as XML (except ...
    Keith Alan ChamberlainKeith Alan Chamberlain
    Apr 10, 2008 at 8:14 pm
    Apr 11, 2008 at 12:23 pm
  • Dear all, I often need to execute functions repeatedly (thousands or more times). While doing so, I encounter two types of problems: 1.) In some models, the estimation process fails due to ...
    Lukas RodeLukas Rode
    Apr 2, 2008 at 3:06 pm
    Apr 5, 2008 at 1:18 pm
  • Hello everybody, I have a problem with accessing class attributes. I think it might be due to namespace access restrictions or something similar, but I'm unable to figure it out, maybe someone knows ...
    Benjamin PolakBenjamin Polak
    Apr 2, 2008 at 10:59 am
    Apr 2, 2008 at 1:18 pm
  • I am trying to save plots that I create using calls to windows() folowed by multiple calls to plot to place several plots on a page. I want to store the plots as variables to be able to recall them ...
    Beck, Kenneth (STP)Beck, Kenneth (STP)
    Apr 21, 2008 at 10:09 pm
    May 1, 2008 at 8:05 am
  • Hi all, I have the following x1<-paste("A", 1:6, sep = "") x2<- round(rgamma(6,2,1)) x3<-paste("B", 1:6, sep = "") x4<- round(rgamma(6,2,1)) data1 <- data.frame(x1,x2,x3,x4) I would like to get data2 ...
    Diego CulattoniDiego Culattoni
    Apr 28, 2008 at 7:06 am
    Apr 30, 2008 at 7:42 am
  • Hi, after updating to 2.7.0, command line completion doesn't work anymore. I understand that the package rcompgen is now part of utils. I hadn't used rcompgen before but completion worked without it ...
    Ralf GoertzRalf Goertz
    Apr 28, 2008 at 8:27 am
    Apr 28, 2008 at 11:20 am
  • Dear all, I want to read in 1000 files which contain varying number of columns. For example: file[1] contains 8 columns (mixture of characters and numbers) file[2] contains 16 columns etc I'm reading ...
    Tania OhTania Oh
    Apr 22, 2008 at 1:05 pm
    Apr 28, 2008 at 10:16 am
  • Hi everyone, The following is mysterious to me. David Brillinger (famous statistician at Berkeley) has an equation in a paper that is essentially g(x,y) = f(x,y) - e(x)- e(y) These are continuous ...
    William SimpsonWilliam Simpson
    Apr 22, 2008 at 7:09 am
    Apr 26, 2008 at 1:28 pm
  • Hi, I have a list of vectors and am trying to coerce them into something that vioplot will take as groups of data to be plotted independently. Can someone nudge me into the right direction? Thanks, ...
    Johannes GraumannJohannes Graumann
    Apr 22, 2008 at 3:21 pm
    Apr 24, 2008 at 1:26 pm
  • Hi, I have loaded a dataset in R : data = label freq1 freq2 news 54 35 fun 37 21 milk 19 7 food 3 3 .... etc And I have a vector flist<-c("fun","food") Now I want to use the vector 'flist' for ...
    Apr 23, 2008 at 7:13 am
    Apr 24, 2008 at 9:20 am
  • Dear All, I have a set of environental maps and presence-only points for some species. How can I generate distributions models on R using these presence-only data? What packages and functions can I ...
    Milton ruserMilton ruser
    Apr 22, 2008 at 3:01 pm
    Apr 23, 2008 at 2:50 pm
  • Dear all, is it possible to set up RGUI or JGR on Windows PC to UTF-8 encoding? I looked for it in mailing lists and in the documentation, but I couldn't figure out it. My problem is e.g. to split a ...
    Hans-Joerg BibikoHans-Joerg Bibiko
    Apr 21, 2008 at 8:40 am
    Apr 22, 2008 at 2:49 pm
  • R version 2.6.2 PowerBook G4 Hello R User, I try to perform an ANCOVA using the glm function. I have a dataset with continuous and categorical data (explanatory variables) and my response variable is ...
    Birgit LemckeBirgit Lemcke
    Apr 21, 2008 at 12:23 pm
    Apr 21, 2008 at 4:08 pm
  • Hi, Is there any functions to insert a vector or matrix into an existing matrix say between row 5 and 6 or column 8 and 9, without creating a temporary matrix ? Thanks Stanley
    Ng StanleyNg Stanley
    Apr 19, 2008 at 1:21 am
    Apr 21, 2008 at 1:01 pm
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