FAQ

Search Discussions

731 discussions - 2,409 posts

  • I saw a thread from September 24 in which Duncan Temple Lang told us: - The package currently has no Rd files, but there is a brief "user's guide". The package is available from ...
    Farrel BuchinskyFarrel Buchinsky
    Dec 15, 2008 at 10:07 pm
    Dec 9, 2009 at 3:17 am
  • Dear colleagues Please could someone kindly explain the following inconsistencies I've discovered when performing logical calculations in R: 8.8 - 7.8 1 Thank you, Emma Jane
    Emma janeEmma jane
    Dec 5, 2008 at 12:23 pm
    Dec 11, 2008 at 10:10 pm
  • Greetings! I come to R by way of Matlab. One feature in Matlab I miss is its "end" keyword. When you put "end" inside an indexing expression, it is interpreted as the length of the variable along the ...
    Mike RoweMike Rowe
    Dec 12, 2008 at 2:45 am
    Dec 12, 2008 at 10:14 pm
  • I?m a PhD student at the University of Warsaw, and have started using R. In many books they specify to use <- instead of = when assigning values, and this is also mentioned in older posts on the R ...
    Petter HedbergPetter Hedberg
    Dec 15, 2008 at 9:26 pm
    Dec 19, 2008 at 12:33 am
  • I've read in many places that R semantics are based on Scheme semantics. As a long-time Lisp user and implementor, I've tried to make this more precise, and this is what I've found so far. I've ...
    Stavros MacrakisStavros Macrakis
    Dec 8, 2008 at 10:59 pm
    Dec 11, 2008 at 2:41 pm
  • Hi All, I'm still pretty new to using R - and I was hoping I might be able to get some advice as to how to use 'apply' or a similar function instead of using nested for loops. Right now I have a ...
    Brigid MooneyBrigid Mooney
    Dec 22, 2008 at 8:20 pm
    Dec 26, 2008 at 4:29 pm
  • Dear R-users, The strsplit function does not exist in S-plus and I would like to use it. How could I reproduce the function in Splus or access to its source code? Thank you in advance, Sebastien
    PomchipPomchip
    Dec 3, 2008 at 7:52 pm
    Sep 21, 2011 at 12:26 am
  • Dear all, I apologize for my basic question. I try to calculate an anova for repeated measurements with 3 factors (A,B,C) having 2, 2, and 7 levels. or with an additional fourth between subjects ...
    SkotaraSkotara
    Dec 4, 2008 at 6:44 pm
    Dec 10, 2008 at 4:18 pm
  • Hello, again I'm on my weblog-script... having problems... This code: =========================== weblog <- read_weblog("web.log") weblog_by_date <- split(weblog, weblog$date) #for ( i in ...
    Oliver BandelOliver Bandel
    Dec 20, 2008 at 9:42 pm
    Dec 21, 2008 at 6:29 pm
  • Dear list, I have a data.frame with x, y values and a 3-level factor "group", say. I want to create a new column in this data.frame with the values of y scaled to 1 by group. Perhaps the example ...
    Baptiste auguieBaptiste auguie
    Dec 10, 2008 at 5:02 pm
    Dec 12, 2008 at 3:51 pm
  • Hi, I have about 900 files that I need to run the same R script on. I looked over the R Data Import/Export Manual and couldn't come up with a way to read in a sequence of files. The files all have ...
    Chris PoliquinChris Poliquin
    Dec 5, 2008 at 6:01 pm
    Dec 7, 2008 at 3:36 am
  • I have two assignment problems... I have written this small code for regression with two regressors . n <- 50 x1 <- runif(n,1,10) x2 <- x1 + rnorm(n,0,0.5) plot(x1,x2) # x1 and x2 strongly correlated ...
    Tanmoy TalukdarTanmoy Talukdar
    Dec 14, 2008 at 1:21 pm
    Dec 14, 2008 at 10:46 pm
  • Dear all, I'm a newbie in R. I have a 45x2x2x8 design. A dataframe stores the metadata of trials. And each trial has its own data file: I used "read.table" to import every trial into R as a dataframe ...
    Tsunhin wongTsunhin wong
    Dec 8, 2008 at 3:11 pm
    Dec 11, 2008 at 3:59 pm
  • Dear useRs, Here is a weird behavior of transform function: mtcars1<-matcars transform(mtcars1,t1=3,t2=4) Error in data.frame(`_data`, e[!matched]) : arguments imply differing number of rows: 32, 1 ...
    Vitalie SpinuVitalie Spinu
    Dec 2, 2008 at 4:14 pm
    Dec 3, 2008 at 1:20 pm
  • Dear useRs, I have a list, each entry of which is a matrix of constant dimensions. Is there a good way (i.e., not using a for loop) to apply a mean to each matrix entry *across list entries*? ...
    Stephan KolassaStephan Kolassa
    Dec 30, 2008 at 2:33 pm
    Dec 30, 2008 at 7:36 pm
  • Hi all, I have a very large binary vector, I wish to calculate the number of 1's over sliding windows. this is my very slow function slide<-function(seq,window){ n<-length(seq)-window tot<-c() ...
    Chris OldmeadowChris Oldmeadow
    Dec 16, 2008 at 4:19 am
    Dec 19, 2008 at 3:37 am
  • Dear R-help, Like several other subscribers, I have recently encountered a problem whereby R will execute code apparently correctly and without error, but any subsequent command will yield "Error ...
    Richard E. ChandlerRichard E. Chandler
    Dec 17, 2008 at 10:34 pm
    Dec 18, 2008 at 12:44 pm
  • hi all, I have a data frame such as: 1 blue 0.3 1 NA 0.4 1 red NA 2 blue NA 2 green NA 2 blue NA 3 red 0.5 3 blue NA 3 NA 1.1 I wish to find the last non-missing value in every 3ple: ie I want a 3 by ...
    Patrizio FredericPatrizio Frederic
    Dec 10, 2008 at 10:09 pm
    Dec 11, 2008 at 10:18 pm
  • Hi the list I would like to add a legend under a graph but at a fixed distance from the graphe. Is it possible ? More precisely, here is my code : --- 8< ---- symboles <- c(3,4,5,6) dn <- ...
    Christophe GenoliniChristophe Genolini
    Dec 5, 2008 at 1:39 pm
    Dec 8, 2008 at 9:30 pm
  • Hello all, I create the following matrix: m <- matrix(1:20, nrow = 10, ncol = 2) which looks like: [,1] [,2] [1,] 1 11 [2,] 2 12 [3,] 3 13 [4,] 4 14 [5,] 5 15 [6,] 6 16 [7,] 7 17 [8,] 8 18 [9,] 9 19 ...
    Guillaume ChapronGuillaume Chapron
    Dec 30, 2008 at 2:59 pm
    Jan 2, 2009 at 7:54 pm
  • Hi all, I am a new graduate student who is also new to R. I am ok with the basics, but the problem I am having right now seems beyond what I can do..so I am looking for advice. I am trying to pull ...
    Titan8883Titan8883
    Dec 17, 2008 at 7:37 pm
    Dec 19, 2008 at 4:15 pm
  • I hope someone can point out my stupid error, because I'm baffled. I am calculating a bunch of variable values and then placing them in a document using odfWeave tags. This is working very nicely for ...
    TubinTubin
    Dec 15, 2008 at 4:12 pm
    Dec 15, 2008 at 10:47 pm
  • Dear R-help, I was comparing SAS (I do not know what version it is) and R (version 2.6.0 (2007-10-03) on Linux) survival analyses with time-dependent covariates. The results differed significantly so ...
    Svetlana EdenSvetlana Eden
    Dec 4, 2008 at 9:05 pm
    Jul 22, 2011 at 8:38 am
  • I'm trying to understand the use of recursive functions described on page 45 of An Introduction to R by the R core development team. A function is a list of expressions, which all get executed with ...
    Joseph G BoyerJoseph G Boyer
    Dec 18, 2008 at 10:22 pm
    Dec 19, 2008 at 3:54 pm
  • Hi all, I'd like to know, if I can solve this with a shorter command: a <- rnorm(100) which(a -0.5 & a < 0.5) # would give me all indices of numbers greater than -0.5 and smaller than +0.5 I have ...
    AntjeAntje
    Dec 16, 2008 at 10:09 am
    Dec 17, 2008 at 1:02 pm
  • I want to generate a list (called "dataList" below) where each of its levels is named. These names are assigned to nameList, which contains all possible permutations of size two taking letters from a ...
    Cliff BehrensCliff Behrens
    Dec 16, 2008 at 4:12 pm
    Dec 16, 2008 at 6:46 pm
  • Hello All, I am trying to carry out variable reduction. I do not have information about the dependent variable, and have only the X variables as it were. In selecting variables I wish to keep, I have ...
    HarshHarsh
    Dec 9, 2008 at 10:34 am
    Dec 9, 2008 at 5:32 pm
  • All - I have data that looks like psd Species Lake Length Weight St.weight Wr Wr.1 vol 432 substock SMB Clear 150 41.00 0.01 95.12438 95.10118 0.0105 433 substock SMB Clear 152 39.00 0.01 86.72916 ...
    Ranney, StevenRanney, Steven
    Dec 22, 2008 at 9:51 pm
    Dec 23, 2008 at 2:29 am
  • I am trying to understand the concept of lexical scope in "An Introduction to R" by the R Core development team. I'd appreciate it if someone would explain why the following example does not work: q ...
    Joseph G BoyerJoseph G Boyer
    Dec 18, 2008 at 10:11 pm
    Dec 20, 2008 at 3:16 pm
  • Hello all, Does anyone know if there exists any function in R that resembles the "lincom" and "nlcom" of STATA?. These functions computes point estimates, standard errors, significance levels, ...
    Marc Marí Dell'OlmoMarc Marí Dell'Olmo
    Dec 12, 2008 at 1:59 pm
    Dec 14, 2008 at 7:10 pm
  • Dear list, I have a variable that consists of typed responses. I wish to compute a variable equal to the number of characters in the original variable. For example: [1] 32 22 12 Any ideas?
    Ista ZahnIsta Zahn
    Dec 12, 2008 at 3:31 pm
    Dec 12, 2008 at 7:40 pm
  • Hi, This has been asked before but not sufficiently answered from what I could find. How do you create combinations with repetitions (multisets) in R? If I have And I want to choose all combinations ...
    Reuben CummingsReuben Cummings
    Dec 11, 2008 at 5:00 pm
    Dec 12, 2008 at 6:33 am
  • Hi all, Is there a simple function already implemented for getting the ISO weeks of a Date object? I couldn't find one, and so wrote my own function to do it, but would appreciate a pointer to the ...
    Gustaf RydevikGustaf Rydevik
    Dec 11, 2008 at 12:43 pm
    Dec 11, 2008 at 8:12 pm
  • Dear List, Apologies for this off-topic post but it is R-related in the sense that I am trying to understand what R is telling me with the data to hand. ROC curves have recently been used to ...
    Gavin SimpsonGavin Simpson
    Dec 15, 2008 at 6:03 pm
    Sep 28, 2011 at 8:14 am
  • Hi, We recently switched from R2.7.0 to R2.8.1 but having problems tracking down this 'invalid multibyte character' encoding issue. Can someone point us how to solve this? R version 2.8.1 ...
    Wijffels, JanWijffels, Jan
    Dec 30, 2008 at 4:14 pm
    Dec 31, 2008 at 10:22 am
  • Hi R-experts, suppose I have a list with containing data frame elements: [[1]] (Intercept) y1 y2 y3 y4 -6.64 0.761 0.383 0.775 0.163 [[2]] (Intercept) y2 y3 -3.858 0.854 0.834 Now I want to put them ...
    Mark HeckmannMark Heckmann
    Dec 29, 2008 at 2:18 pm
    Dec 30, 2008 at 10:57 am
  • Please provide me the info on what are the 4 questions about the parameters in hypothesis testing Thanks. Aman - CONFIDENTIAL- This email and any files transmitted with it are confide...{{dropped:9}}
    Khawaja, AmanKhawaja, Aman
    Dec 23, 2008 at 11:20 pm
    Dec 25, 2008 at 9:20 pm
  • "10-02-2008" "10-03-2008" "10-06-2008" "10-07-2008" "10-09-2008" "10-10-2008" "10-13-2008" "10-14-2008" "10-15-2008" "10-16-2008" "10-17-2008" "10-20-2008" "10-21-2008" "10-22-2008" "10-23-2008" ...
    RON70RON70
    Dec 16, 2008 at 12:54 pm
    Dec 16, 2008 at 2:22 pm
  • John Horton Senior Statistician - DCRI 2400 Pratt Street Room 0311 Terrace Level Durham NC 27705 919-668-8048 (p), 919-668-7049 (f) <span class="m_body_email_addr" ...
    John R HortonJohn R Horton
    Dec 1, 2008 at 3:12 pm
    Dec 16, 2008 at 12:20 pm
  • Um texto embutido e sem conjunto de caracteres especificado foi limpo... Nome: n?o dispon?vel Url: <https://stat.ethz.ch/pipermail/r-help/attachments/20081213/46a8bb40/attachment.pl
    Marcus ViniciusMarcus Vinicius
    Dec 14, 2008 at 12:15 am
    Dec 15, 2008 at 9:37 am
  • Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?... Nom : non disponible URL : <https://stat.ethz.ch/pipermail/r-help/attachments/20081202/10f66fc6/attachment.pl
    Christophe DutangChristophe Dutang
    Dec 2, 2008 at 9:10 pm
    Dec 3, 2008 at 8:12 pm
  • Hi, I have a situation where I have a set of pairs of X & Y variables for each of which I have a (fairly) well-defined PDF. The PDF(x_i) 's and PDF(y_i)'s are unfortunately often rather non-Gaussian ...
    Jarle BrinchmannJarle Brinchmann
    Dec 1, 2008 at 11:34 pm
    Dec 3, 2008 at 8:09 am
  • I've written a program which will be run by someone who isn't an R programmer and isn't all that computer-savvy in general. The user starts the program and is prompted to input various information ...
    TubinTubin
    Dec 31, 2008 at 9:33 pm
    Jan 1, 2009 at 8:48 pm
  • Hello all, My question has to do with writing to pdf/ps files. Currently, my R program requires 100+ pdf devices to be open, which is over the limit of 64 devices that can be open at the same time, ...
    Alex PineAlex Pine
    Dec 29, 2008 at 7:57 pm
    Jan 1, 2009 at 9:47 am
  • I hope to use the plotmath facility to print titles that mix math and values of R variables. The help for "plotmath" has an example, which after repeated reading, I find baffling. Likewise, I have ...
    Mike PragerMike Prager
    Dec 31, 2008 at 4:47 pm
    Dec 31, 2008 at 10:41 pm
  • Hello, I have interval censored data, censored between (0, 100). I used the tobit function in the AER package which in turn backs on survreg. Actually I'm struggling with the distribution. Data is ...
    Geraldine HenningsenGeraldine Henningsen
    Dec 23, 2008 at 7:08 pm
    Dec 30, 2008 at 5:39 pm
  • Dear list members: I am looking for an elegant (or efficient) way to accomplish the following: take a large boolean vector and fill the TRUE values with the values from a smaller boolean vector that ...
    Milton HuangMilton Huang
    Dec 24, 2008 at 9:05 am
    Dec 24, 2008 at 9:25 pm
  • Hi, I read data from a file. I'm trying to understand how to use Design.rcs by using simple test data first. I use 1000 integer values (1,...,1000) for x (the predictor) with some noise (x+.02*x) and ...
    SpSp
    Dec 23, 2008 at 4:38 am
    Dec 23, 2008 at 10:49 pm
  • I would like to add a column to the airquality dataset that contains the date 1950-01-01 in each row. This method does not appear to work: Error in data.frame(list(Ozone = c(41L, 36L, 12L, 18L, NA, ...
    Tom La BoneTom La Bone
    Dec 23, 2008 at 1:24 pm
    Dec 23, 2008 at 4:14 pm
  • While I'm not an R expert, I have used R on Windows XP. Now I've moved to Ubuntu (Intrepid), and I'm trying to configure R to work with the Gelman and Hill _Data Analysis Using Regression and ...
    Bill HarrisBill Harris
    Dec 20, 2008 at 1:13 am
    Dec 20, 2008 at 4:19 am
Group Navigation
period‹ prev | Dec 2008 | next ›
Group Overview
groupr-help @
categoriesr
discussions731
posts2,409
users676
websiter-project.org
irc#r

676 users for December 2008

Gabor Grothendieck: 119 posts Prof Brian Ripley: 92 posts David Winsemius: 71 posts Wacek Kusnierczyk: 51 posts Peter Dalgaard: 50 posts Hadley wickham: 45 posts Charles C. Berry: 36 posts Duncan Murdoch: 35 posts Greg Snow: 33 posts Stavros Macrakis: 31 posts Frank E Harrell Jr: 29 posts Jim Holtman: 28 posts Ben Bolker: 26 posts Uwe Ligges: 26 posts Henrique Dallazuanna: 25 posts John Fox: 23 posts Dieter Menne: 22 posts Stephen sefick: 21 posts Sarah Goslee: 19 posts Baptiste auguie: 18 posts
show more
Archives