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618 discussions - 2,076 posts

  • Readers of this list might be interested in the following commenta about R. In a recent report, by Michael N. Mitchell http://www.ats.ucla.edu/stat/technicalreports/ says about R: "Perhaps the most ...
    Kjetil HalvorsenKjetil Halvorsen
    Jan 1, 2006 at 2:36 pm
    Jan 9, 2006 at 11:37 am
  • I feel that as long as people continue to provide help on r-help wikis will not be successful. I think we need to move to a central wiki or discussion board and to move away from e-mail. People are ...
    Frank E Harrell JrFrank E Harrell Jr
    Jan 6, 2006 at 1:04 am
    Jan 13, 2006 at 1:06 am
  • [ronggui] Just (another) thought. I used to use SPSS, many, many years ago, on CDC machines, where the CPU had limited memory and no kind of paging architecture. Files did not need to be very large ...
    François PinardFrançois Pinard
    Jan 5, 2006 at 3:46 pm
    Jan 9, 2006 at 1:44 pm
  • Folks, I have a very basic question. The solution eludes me perhaps because of my own lack of creativity. I am not attaching a fully reproducible session because the issue may well be becuase of the ...
    Vivek SatsangiVivek Satsangi
    Jan 15, 2006 at 11:06 am
    May 4, 2010 at 4:05 pm
  • I have some doubts about the validity of my procedure to estimeate linear contrasts ina a factorial design. For sake of semplicity, let's imagine a one way ANOVA with three levels. I am interested to ...
    Posta Univ. CagliariPosta Univ. Cagliari
    Jan 18, 2006 at 4:32 pm
    Jan 27, 2006 at 7:49 pm
  • Hi R-listers, I have a simple question about a data frame. I sorted a data set by one of the variable in some condition (eg. X =0), the followed is part of the achieved. I was wondering how can I get ...
    Leaf SunLeaf Sun
    Jan 30, 2006 at 8:31 pm
    Feb 5, 2006 at 11:20 pm
  • Hello, I've seen this question asked in the archives but no clear reply or solution provided. So, just to be sure it is not possible in R: Can I replace backslashes with slashes in a string ? I am ...
    Yvonnick noelYvonnick noel
    Jan 4, 2006 at 11:02 am
    Jan 5, 2006 at 7:48 pm
  • Hello, Is there a simple and fast function that returns a vector of the number of replications for each object of a vector ? For example : I have a vector of IDs : ids <- c( "ID1", "ID2", "ID2", ...
    Laetitia MarisaLaetitia Marisa
    Jan 24, 2006 at 5:05 pm
    Jan 25, 2006 at 12:44 am
  • Hi, i need to create a fractional factorial design sufficient to estimate the main effects. The factors may have any number of levels, let's say any number from 2 to 6. I've tried to use the library ...
    Roberto FurlanRoberto Furlan
    Jan 20, 2006 at 8:36 pm
    Jan 25, 2006 at 12:14 am
  • If anyone has a list of application areas where there is extensive use of R, I'd like to hear of it. My current short list is: Bioinformatics Epidemiology Geophysics Agriculture and crop science John ...
    John MaindonaldJohn Maindonald
    Jan 23, 2006 at 7:35 pm
    Jan 24, 2006 at 6:16 pm
  • I am currently using R 2.1.1 under Windows and I do not seem to be able to load the current versions of lme4/Matrix. I have run 'update.packages.' I understand this is still experimental software but ...
    White, Charles E WRAIR-Wash DCWhite, Charles E WRAIR-Wash DC
    Jan 12, 2006 at 6:50 pm
    Jan 19, 2006 at 1:45 pm
  • Sometimes I print out a package and read about it and there are sometimes nice examples that I would like to run myself. Is there a way to bring them into R from the package or are they only meant to ...
    Mark LeedsMark Leeds
    Jan 9, 2006 at 6:20 pm
    Jan 14, 2006 at 5:53 pm
  • I am trying to send a manuscript to a journal. One of the figures build by R is in the right orientation and 4 are rotated clockwise 90 deg in the preview. I used the right click save to PS option ...
    Knut KruegerKnut Krueger
    Jan 18, 2006 at 12:04 pm
    Jul 25, 2006 at 9:46 am
  • I am a statistician and I come up to an interesting problem in cryptography. I would like to use R since there are some statistical procedures that I need to use. However, I run into a problem when ...
    Ionut FlorescuIonut Florescu
    Jan 30, 2006 at 4:32 pm
    Jan 31, 2006 at 7:34 am
  • Can someone help me understand the following: R version 2.2.1, 2005-12-20, i386-pc-mingw32 attached base packages: [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" [7] "base" By my ...
    Spencer GravesSpencer Graves
    Jan 25, 2006 at 10:42 pm
    Jan 26, 2006 at 7:30 pm
  • Hello All- I found an inconsistency between the R-squared reported in Excel vs. that in R, and I am wondering which (if any) may be correct and if this is a known issue. While it certainly wouldn't ...
    Lance WesterhoffLance Westerhoff
    Jan 24, 2006 at 4:50 pm
    Jan 25, 2006 at 5:12 pm
  • I just updated the packages on my pc (windows xp). When loading lme4 I get Error: package 'Matrix' 0.995-1 was found, but = 0.995.2 is required by 'lme4' 'Matrix' 0.995-1 is indeed installed on my ...
    Søren HøjsgaardSøren Højsgaard
    Jan 21, 2006 at 11:15 am
    Jan 23, 2006 at 10:01 pm
  • Hi, I've been looking for Image Processing packages. Thresholding, Edge Filters, Dct, Segmentation, Restoration. I'm aware, that Octave, Matlab etc. would be a good address but then I'm missing the ...
    Thomas KaliweThomas Kaliwe
    Jan 23, 2006 at 12:24 pm
    Jan 31, 2006 at 2:18 am
  • Hi, Is there something like a hashtable or (python) dictionary in R/Splus? (If not, is there a reason why it's not needed / typical way to accomplish the same thing?) Thank you
    Context greyContext grey
    Jan 30, 2006 at 1:34 am
    Jan 30, 2006 at 5:00 pm
  • Dear R People: I am trying to build a package (yet again!) I have both PCTex and WinEdt. I want the *.tex files to use WinEdt. How should I set that, please? Just in the path? Also, where would I get ...
    Erin HodgessErin Hodgess
    Jan 7, 2006 at 8:32 pm
    Jan 26, 2006 at 7:30 pm
  • Hello, I am new to using R and I am having problems get boot() to work properly. Here is what I am trying to do: I have statistic called "cs". cs takes a data matrix (154 x 5) and calculates 12 ...
    Ben RidenhourBen Ridenhour
    Jan 18, 2006 at 6:02 am
    Jan 19, 2006 at 1:07 am
  • Hi, I' m having a hard time understanding the computation of degrees of freedom when runing nlme() on the following model: dLt ~ Lt | ID TasavB<- function(Lt, Linf, K) (K*(Linf-Lt)) my model.nlme <- ...
    Gabriela escati peñalozaGabriela escati peñaloza
    Jan 27, 2006 at 3:04 pm
    Jan 31, 2006 at 5:52 pm
  • Dear R-helpers, I'm trying to develop a function which specifies all possible expressions that can be formed using a certain number of variables. For example, with three variables A, B and C we can ...
    Adrian DUSAAdrian DUSA
    Jan 30, 2006 at 11:34 am
    Jan 31, 2006 at 4:35 pm
  • Hi all, I am really new to the R language. I am a long time Matlab and C++ user and I was "forced" to learn R because I am taking a statistics class. I am seeking to reduce the learning curve to as ...
    MichaelMichael
    Jan 25, 2006 at 8:09 am
    Jan 26, 2006 at 1:02 pm
  • Greetings: I'm going to encourage some students to try Bayesian ideas for hierarchical models. I want to run the WinBUGS and R examples in Tony Lancaster's An Introduction to Modern Bayesian ...
    Paul JohnsonPaul Johnson
    Jan 16, 2006 at 10:13 pm
    Jan 18, 2006 at 11:37 am
  • Hello! I am currently in the process of creating (my first) package, which (when ready) I intend to publish to CRAN. In the process of creating this package I have taken some code form existing ...
    Ales ZibernaAles Ziberna
    Jan 13, 2006 at 7:04 am
    Jan 16, 2006 at 12:30 am
  • Hi, I'm trying to figure out if there's an automated way to get read.table to read in my data and *not* convert the character columns into anything, just leave them alone. What I'm referring to as ...
    Douglas GroveDouglas Grove
    Jan 26, 2006 at 10:32 pm
    Feb 15, 2006 at 2:22 am
  • Hello, I came across the following behavior, which seems illogical to me. I don't know if it is a bug or if I'm missing something: [1] FALSE This actually came up in practice when I did something ...
    Elizabeth PurdomElizabeth Purdom
    Jan 30, 2006 at 5:43 am
    Jan 31, 2006 at 8:07 am
  • Hi, Before I reinvent the wheel I wanted to kindly ask you for your opinion if there is a simple way to do it. I want to merge a larger number of tables from different data sources in R and the ...
    Werner WernersenWerner Wernersen
    Jan 10, 2006 at 3:49 pm
    Jan 11, 2006 at 2:41 pm
  • Quoting from Thomas's message - A Randomized Controlled Trial?: Doing such trials would be a 30-year project. The entry criterion might be at least a pass score on a test that was designed to ...
    John MaindonaldJohn Maindonald
    Jan 5, 2006 at 12:17 am
    Jan 5, 2006 at 4:37 pm
  • By way of review, most large Web sites allow the user to create *bookmarks* which link to pages inside the Web site. However, here, the pages have one of just two URL's: http://www.r-project.org and ...
    Thomas L JonesThomas L Jones
    Jan 2, 2006 at 10:33 pm
    Jan 3, 2006 at 3:35 pm
  • Hi all, After trial and error by myself for a few hours, I decide to ask for your help. I have a training set which is a matrix of size 200 x 2, where the two columns denote each independent ...
    MichaelMichael
    Jan 29, 2006 at 10:11 pm
    Jan 31, 2006 at 8:09 am
  • Hi R users I have a simple question to ask. Why am I getting FALSE on this [1] FALSE 10 is a integer number. Thanks in advance. M
    Taka MatzmotoTaka Matzmoto
    Jan 25, 2006 at 3:29 am
    Jan 25, 2006 at 6:29 pm
  • I know that (for windows users) there exists an extension for WinEdt for R. Is there an editor plugin for eclipse as well. Eclipse is free, cross-plattform, well known, ... I found nothing on the ...
    Thomas SteinerThomas Steiner
    Jan 24, 2006 at 10:31 am
    Jan 24, 2006 at 5:46 pm
  • Folks, I am holding a dataset where firms are observed for a fixed (and small) set of years. The data is in "long" format - one record for one firm for one point in time. A state variable is observed ...
    Ajay Narottam ShahAjay Narottam Shah
    Jan 22, 2006 at 12:38 am
    Jan 23, 2006 at 9:45 am
  • R Version 2.2.0 Platform: Windows When I use barplot but select a ylim value greater than zero, the graph is distorted. The bars extend below the bottom of the graph. For instance the command ...
    Bliese, Paul D LTC USAMHBliese, Paul D LTC USAMH
    Jan 5, 2006 at 1:01 pm
    Jan 8, 2006 at 2:13 am
  • Hello! I would like to put an object in to a function that calls the current function. I thought the answer will be clear to me after reading the help files: ?assign ?sys.parent However it is not ...
    Ales ZibernaAles Ziberna
    Jan 4, 2006 at 2:14 pm
    Jan 4, 2006 at 7:39 pm
  • I teach biology, and would like to show the students how to use R for some statistical assignments. One of those is to make a kite diagram (for example as seen in ...
    Par LeijonhufvudPar Leijonhufvud
    Jan 16, 2006 at 7:58 am
    Jul 9, 2010 at 9:15 am
  • Hi all, I successfully installed Rcmdr. And I type "library(Rcmdr)", nothing happened; or if I select menu item "load package" and select "Rcmdr", still nothing happened... Why didn't Rcmdr start? ...
    MichaelMichael
    Jan 26, 2006 at 9:11 am
    Jan 27, 2006 at 9:05 am
  • Dear alltogether, how can a delay like possible with par(ask=TRUE) be attained while using trellis-plots within a loop or something like that? the following draws each plot without waiting for a ...
    Leo GürtlerLeo Gürtler
    Jan 11, 2006 at 12:41 pm
    Jan 14, 2006 at 9:46 pm
  • ... and is there also such a nice tool (like spss.get) for exporting data frames to SPSS? write.table does not keep the data frame labels - neither did the other exporting tools that I found. Thanks! ...
    Michael ReineckeMichael Reinecke
    Jan 11, 2006 at 3:57 pm
    Jan 12, 2006 at 2:00 pm
  • I have 2 dataframes, each with 5 columns and 20 rows. They are called data1 and data2.I wish to create a third dataframe called data3, also with 5 columns and 20 rows. I want data3 to contains the ...
    R userR user
    Jan 11, 2006 at 1:25 am
    Jan 12, 2006 at 6:05 am
  • Hello list, I am used to give a lot of attention to the standardized regression coefficients, which in SPSS are listed automatically. Is there alternative to running the last two lines in the ...
    Dr. Walter H. SchreiberDr. Walter H. Schreiber
    Jan 16, 2006 at 4:24 pm
    Sep 26, 2011 at 1:30 pm
  • Hi all, R is so difficult. I am so desperate. What does the ":" mean in the following statement? What does the "[, -1]" mean? Thanks a lot!
    MichaelMichael
    Jan 30, 2006 at 4:44 am
    Jan 31, 2006 at 9:44 pm
  • Hi, there: As you all know, correlation is not a very robust procedure. Sometimes correlation could be driven by a few outliers. There are a few ways to improve the robustness of correlation (pearson ...
    Yang X QiuYang X Qiu
    Jan 25, 2006 at 8:37 pm
    Jan 26, 2006 at 5:32 pm
  • Dear R experts, Is it true that R generally cannot handle medium sized data sets(a couple of hundreds of thousands observations) and threrefore large date set(couple of millions of observations)? I ...
    Gueorgui KolevGueorgui Kolev
    Jan 24, 2006 at 2:17 pm
    Jan 25, 2006 at 9:16 am
  • I know that this isn't really a R help question, but I am a psychology student at TRU (tru.ca) and my psych department is going to be switching statistical software in the near future. I thought this ...
    pat_primate (sent by Nabble.com)pat_primate (sent by Nabble.com)
    Jan 23, 2006 at 8:44 pm
    Jan 24, 2006 at 11:27 pm
  • Hi there, I have a question about one command sentence when I follow the example in the book of "Survival analysis in S": but I got the error warning: NULL data frame with 23 rows Thus, I couldn't ...
    Linda LeiLinda Lei
    Jan 20, 2006 at 10:28 pm
    Jan 24, 2006 at 2:15 am
  • Hi is anybody aware of a function to calculate a the median for specified columns in a dataframe or matrix - so analogous to rowMeans? Thanks Max --
    Max KauerMax Kauer
    Jan 20, 2006 at 3:24 pm
    Jan 22, 2006 at 11:44 am
  • Thanks to some help by Doug Bates (and the updated version of the Matrix package), I've refined my question about fitting nested and non-nested factors in lmer(). I can get it to work in linear ...
    Andrew GelmanAndrew Gelman
    Jan 10, 2006 at 7:29 pm
    Jan 21, 2006 at 10:45 pm
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