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291 discussions - 820 posts

  • First, I love R and am grateful to be using this free and extremely high quality software. Recently I have been comparing two algorithms and naturally I programmed in R first. It is so slow that I ...
    Jason LiaoJason Liao
    Aug 6, 2002 at 8:12 pm
    Aug 12, 2002 at 2:10 pm
  • Hi all, I would like to plot some points and define the bg color of my graphics. But the bg parameter set is defined for the. whole graphic. In fact, i would like to use something like ...
    Olivier MartinOlivier Martin
    Aug 20, 2002 at 6:56 am
    Aug 24, 2002 at 3:13 am
  • Greetings, I have a meta-analysis problem in which I have fixed effects regression coefficients (and estimated standard errors) from identical models fit to different data sets. I would like to use ...
    J.R. LockwoodJ.R. Lockwood
    Aug 29, 2002 at 6:00 pm
    Aug 30, 2002 at 8:31 pm
  • Dear List, Does anyone know when will be available Peter Dalgaard's book: "Introductory Statistics with R" ?. According to Amazon: "This item will be published on August 15, 2002", but it continues ...
    CARLOS ORTEGACARLOS ORTEGA
    Aug 27, 2002 at 10:43 am
    Aug 27, 2002 at 9:42 pm
  • Hi, I'm actually afraid that this is a RTFM question - I read the manual but didn't find anything yet... I'm looking for a way to document R sourcecode in my thesis. Does anyone know of a tool or ...
    Daniel HoppeDaniel Hoppe
    Aug 13, 2002 at 1:08 pm
    Aug 15, 2002 at 12:04 pm
  • Hi, I'm trying to create a linear model for a dataset that has a breakpoint e.g. # dummy dataset x <- 1:20 y <- c(1:10,seq(10.5,15,0.5)) plot(x,y) I've modelled this using the following formula: temp ...
    David OrmeDavid Orme
    Aug 30, 2002 at 8:13 am
    Sep 11, 2002 at 1:21 pm
  • Hello, I downloaded R today because I was told it has very good bootstrapping abilities. What I need to do is to program it (or use an existing program) to bootstrapping test for multimodality using ...
    Sangeeta GoyalSangeeta Goyal
    Aug 5, 2002 at 2:06 am
    Aug 28, 2002 at 6:54 am
  • I am using GLM to calculate logit models based on cross-sectional data. I am now down to the hard work of making the results intelligible to very average readers. Is there any way to calculate a ...
    Paul M. JacobsonPaul M. Jacobson
    Aug 4, 2002 at 1:08 pm
    Aug 8, 2002 at 1:37 pm
  • Hi all, I am using R1.5.0 under Unix, I have a couple of questions here. 1. My program is running out of memory. I am writing a program to grow a list of trees using rpart() on a subset of a large ...
    Saket JoshiSaket Joshi
    Aug 29, 2002 at 7:33 pm
    Sep 11, 2002 at 8:25 am
  • Hello all I have done some fitting of pnorm functions to dose-response data, so I could calculate EC50 values (dose where the response is 0.5). I used the nlm function for this, so I did not get any ...
    Johannes RankeJohannes Ranke
    Aug 27, 2002 at 3:49 pm
    Aug 28, 2002 at 8:19 am
  • Hi, I'm creating a lot of tables in a file for inclusion in a Latex document. When I try to compile that document there is an error "too many unprocessed floats." Is there a way to correct this? ...
    Brian SchollBrian Scholl
    Aug 23, 2002 at 7:59 am
    Aug 23, 2002 at 6:07 pm
  • Hi folks: I think I'm having problems with figuring this one out: test1 <- function() { n <- 2 for(i in 1:n) { cat(paste("i =", i, "\n")); flush.console() n <- 5 # version 1 #n <<- 5 # version 2 ...
    Prasad, RajivPrasad, Rajiv
    Aug 26, 2002 at 5:54 pm
    Aug 27, 2002 at 4:20 pm
  • Hi, I have encountered the following error, when using 'aov', which I think has something to do with the length of my call to 'aov', and I cannot understand why: Error in model.frame.default(formula ...
    Albert KimAlbert Kim
    Aug 22, 2002 at 6:39 pm
    Aug 25, 2002 at 8:06 am
  • I am seeking for a method to calculate, given a fitted lme model and some data for a subject, the random effects predictors for this subject. I can only find predictors for the subjects used in ...
    Wilhelm B. KlokeWilhelm B. Kloke
    Aug 16, 2002 at 11:57 am
    Aug 19, 2002 at 12:03 pm
  • Hi, I have made a tiny package for saving dataframes in ASCII format. The package contains functions save.table() and save.delim(), the first mimics (not completely) write.table() and the second uses ...
    Ott ToometOtt Toomet
    Aug 10, 2002 at 8:28 am
    Aug 12, 2002 at 4:16 pm
  • Dear R users, I ran into this curious problem: [1] 2.517502 Admittedly the method of computing the mass under the density curve at line 3 is crude. But 2.5 is pretty far from 1, the value it should ...
    Jonathan LiJonathan Li
    Aug 30, 2002 at 7:50 pm
    Aug 30, 2002 at 8:43 pm
  • A friend of mine recently mentioned that he had painlessly imported a data file with 8 columns and 500,000 rows into matlab. When I tried the same thing in R (both Unix and Windows variants) I had ...
    Magnus Lie HetlandMagnus Lie Hetland
    Aug 28, 2002 at 3:38 am
    Aug 28, 2002 at 8:10 am
  • Hi everyone, I've got a dataframe called 'faculty'. I want to do a weighted mean on the column called 'Q8' weighted by the contents of column 'CETP'. In addition, I need to operate on the result of ...
    Tim WilsonTim Wilson
    Aug 20, 2002 at 8:35 pm
    Aug 22, 2002 at 1:04 pm
  • Hi everyone, I'm having trouble figuring out how to split a dataframe more than once. Let's say I have a dataframe d with a certain column called splitcol composed of four possible ordinal values ...
    Tim WilsonTim Wilson
    Aug 15, 2002 at 11:25 pm
    Aug 16, 2002 at 2:49 pm
  • Hello All: I am looking for you help. I am trying to replicate the results of an example found in Alan Agresti's "Categorical Data Analysis" on pages 267-269. The example is one of a 2 x 2 ...
    Andrew CriswellAndrew Criswell
    Aug 11, 2002 at 4:31 am
    Aug 16, 2002 at 1:39 pm
  • I have a probably basic problem concerning the R language. I will write some small R programs but don't really know how to start. Do I have to create my files in some editor like emacs or can I write ...
    Alexandra PatrikssonAlexandra Patriksson
    Aug 12, 2002 at 3:55 pm
    Aug 12, 2002 at 7:41 pm
  • I read a tab-delimited ASCII table, with a header, into R thus. Table <- read.table(FileName, header=TRUE, sep="\t"); Is there any way I can now retrieve the header. The header information is ...
    PLaurenPLauren
    Aug 5, 2002 at 8:12 pm
    Aug 6, 2002 at 3:20 am
  • I want to plot some 3D points on top of the grid produced by persp(). On 2/22/01, Paul Murrell <paul at stat.auckland.ac.nz wrote in R-help: But persp() does return something (in R-1.5.1): a 4x4 ...
    David BrahmDavid Brahm
    Aug 1, 2002 at 5:33 pm
    Aug 2, 2002 at 7:08 am
  • Has anyone written something that runs ordered logit or probit in R? If so, where might it be Located... Kevin -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help ...
    Kevin KartyKevin Karty
    Aug 30, 2002 at 4:22 pm
    Aug 30, 2002 at 9:45 pm
  • Hi, I had a look at the MASS4 scripts in the MASS package, in Ch 11.3 Factor Analysis, there is a section of codes like: data(ability.cov) ability.FA <- factanal(covmat = ability.cov, factors = 1) ...
    Ko-Kang Kevin WangKo-Kang Kevin Wang
    Aug 29, 2002 at 9:55 am
    Aug 30, 2002 at 12:47 pm
  • Hello: Can you tell me if there's a simple way to generate in R random vectors on the unit sphere in R^{n}? Additionally, are there references for this question? Thanks in advance. Tom ...
    Richards, TomRichards, Tom
    Aug 26, 2002 at 11:11 pm
    Aug 28, 2002 at 11:10 am
  • Dear R-users I would like to draw a barplot with a special y-axis. Most of my data points are in the range from -50 to 50, apart from one value that is 550. I would now like to have a y-axis from -50 ...
    Nicolas SchneiderNicolas Schneider
    Aug 23, 2002 at 3:46 pm
    Aug 24, 2002 at 11:19 am
  • Dear R-list I am having troubles understanding how the function is.numeric() works. Any help appreciated. Some commands are given here (the output and my comments are given below) vec <- c(1.4, NA, ...
    Ole ChristensenOle Christensen
    Aug 21, 2002 at 12:52 pm
    Aug 22, 2002 at 3:33 pm
  • I hope that someone can help me with the following question: I would like to solve the Markowitz optimization problem WITH short-sale constraints. Maybe a procedure to solve a quadratic optimization ...
    Enrico De GiorgiEnrico De Giorgi
    Aug 21, 2002 at 7:05 am
    Aug 22, 2002 at 7:18 am
  • I have been given a 'code' file and a 'data' file which is designed for use in R. I have successfully installed the program onto my pc, but am struggling to actaully use the code. How do i prompt R ...
    Mark EdwardsMark Edwards
    Aug 21, 2002 at 9:41 am
    Aug 21, 2002 at 10:17 am
  • I need to calculate a large number of t statistics, and would like to do so via matrix operations. So far I have figured out a way to calculate the mean of each row of the matrix: d <- ...
    Kort, EricKort, Eric
    Aug 14, 2002 at 4:12 pm
    Aug 15, 2002 at 2:03 pm
  • Dear All, I have a problem that I think could be solved much more efficiently, but I don't have a clue how to accomplish this. I have a matrix W with dimensions k*(p+1): Let's say W is 5*4 and looks ...
    Wolfgang ViechtbauerWolfgang Viechtbauer
    Aug 9, 2002 at 8:40 pm
    Aug 10, 2002 at 7:26 am
  • Hi, I am trying to minimize a rather complex function of 5 parameters with gafit and nlm. Besides some problems with both optimization algorithms (with respect to consistantly generating similar ...
    Jan MeyerJan Meyer
    Aug 6, 2002 at 4:58 am
    Aug 6, 2002 at 5:27 pm
  • Hello everyone, I'm using R 1.5.1 on Windows. I chose the option 'Install Source Files' when installing R. The code below shows my use of the command SHLIB and the error I get. C:\R\rw1051\bin Rcmd ...
    Paul LouisellPaul Louisell
    Aug 4, 2002 at 3:25 am
    Aug 6, 2002 at 7:26 am
  • Hi Is there a command which will return the complete pathname of the file from which the current source is being read? I want something which can be inserted into any .r file and it will be able to ...
    David RichmondDavid Richmond
    Aug 5, 2002 at 2:31 am
    Aug 5, 2002 at 4:16 pm
  • Hi everyone, Here's a question about extracting data from a dataframe: Let's say I've got a dataframe with two vectors, TEST and GENDER. GENDER contains a 1 for males and 2 for females. I want to ...
    Tim WilsonTim Wilson
    Aug 2, 2002 at 3:31 pm
    Aug 5, 2002 at 11:24 am
  • Hello, How does one copy objects between Workspaces? Thank you, Deborah -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read ...
    Deborah S. RochaDeborah S. Rocha
    Aug 1, 2002 at 6:09 pm
    Aug 2, 2002 at 11:59 am
  • Howdy, When doing a install.packages("ROracle") in R I'm getting the following error: R CMD COMPILE RS-DBI.c make[1]: Entering directory `/tmp/R.INSTALL.1809/ROracle/src' gcc -I/usr/lib/R/include ...
    Vikram KhuranaVikram Khurana
    Aug 7, 2002 at 9:08 pm
    Jul 2, 2004 at 1:12 am
  • On two lists of data (in a matrix perhaps?) And may i also know where I can find the complete documentation of how to use all the functions in R? Thank you for your help! ...
    Chromatonus 712Chromatonus 712
    Aug 29, 2002 at 7:36 pm
    Sep 11, 2002 at 10:58 am
  • Folks, Having problems getting started with SJava and request help. I get this error when running .JavaInit() (within RGui 1.5.1, on Windows 2000): Error in .JavaInit() : Couldn't start Java Virtual ...
    Stephen C. UptonStephen C. Upton
    Aug 29, 2002 at 2:02 am
    Aug 29, 2002 at 4:58 pm
  • To whom it may concern, I am interested in generating data from an ARMA(p,q) process in R. I know that there are functions in S which allow for this, but I don't know if such functions exist in R. Do ...
    Carsten BottsCarsten Botts
    Aug 26, 2002 at 11:14 pm
    Aug 27, 2002 at 3:12 pm
  • Hi All, I have already used gcc to creat a library, for example, it is called "test.a", which includes many c objects. How to link my main "a.c" function to this library when I used Rcmd SHLIB to ...
    Xiaoping JinXiaoping Jin
    Aug 24, 2002 at 2:19 am
    Aug 24, 2002 at 7:00 am
  • Hi, Stupid question I guess but I can't figure out how to have a span of 0.5 instead of 1 in my graph. Actually, I want to create a plot with x(-2,2) and y(-2,2) and an step of 0.5 along the axis ...
    Nolwenn Le MeurNolwenn Le Meur
    Aug 23, 2002 at 12:23 pm
    Aug 23, 2002 at 6:13 pm
  • During a R session (Version 1.4.1 under Windows) I ended up getting the following error message: Error: vector memory exhausted (limit reached?) independently of the command like rm(something), q(), ...
    Nikolaus HansenNikolaus Hansen
    Aug 14, 2002 at 6:31 pm
    Aug 22, 2002 at 9:27 am
  • Hi: Thanks a lot to Deepayan Sarkar, author of lattice I think, who solved my first query. I am afraid that I have another one. I am plotting several mutipanels boxplots (with one conditioning ...
    Jean-Pierre GattusoJean-Pierre Gattuso
    Aug 21, 2002 at 2:13 pm
    Aug 22, 2002 at 8:49 am
  • Dear All, I have a file (a matrix) on which I have to compute the correlations. The function "cov" compute the correlations between the columns of a matrix, but I want to compute the correlations ...
    Laurence RichardLaurence Richard
    Aug 22, 2002 at 1:21 am
    Aug 22, 2002 at 5:24 am
  • hi, i just recognized that the t() function converts a data frames into a matrix (R 1.5). is that a bug or a feature ? greetinx jan ...
    Jan Malte WienerJan Malte Wiener
    Aug 20, 2002 at 2:43 pm
    Aug 20, 2002 at 7:19 pm
  • Can anyone show me how to connect a scrollbar to a text widget using the tcltk library? I'm confused about how to make sure the two widgets know about each other and how to set up the appropriate ...
    Michael A. MillerMichael A. Miller
    Aug 13, 2002 at 4:41 pm
    Aug 16, 2002 at 8:22 pm
  • At the end of the 'Details:' section of the help on Anova (car package), it states: The standard R `anova' function calculates sequential (type-I) tests. These rarely test meaningful hypotheses. So I ...
    Patrick ConnollyPatrick Connolly
    Aug 14, 2002 at 3:14 am
    Aug 14, 2002 at 9:53 pm
  • Dear all, I have a question about the way the replacement of elements in an array works in R (having a slight idea of the answer), and a question about the way to achieve my goals. If I have a 3 ...
    Laurent GautierLaurent Gautier
    Aug 13, 2002 at 3:26 pm
    Aug 13, 2002 at 7:57 pm
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Ripley: 95 posts Peter Dalgaard BSA: 27 posts Thomas Lumley: 26 posts Uwe Ligges: 22 posts Martin Maechler: 18 posts John Fox: 15 posts Ott Toomet: 12 posts Ko-Kang Kevin Wang: 11 posts Laurent Gautier: 11 posts Kjetil halvorsen: 10 posts Chr Schulz: 9 posts Frank E Harrell Jr: 9 posts Liaw, Andy: 9 posts Tim Wilson: 9 posts Adaikalavan Ramasamy: 8 posts A.J. Rossini: 8 posts David Brahm: 8 posts Pauline Gu: 8 posts Ko-Kang Kevin Wang: 7 posts Ravi Varadhan: 7 posts
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