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548 discussions - 1,723 posts

  • can you recommend a good manual for R that starts with a data set and gives demonstrations on what can be done using R? I downloadedR Langauage definition and An introduction to R but haven't found ...
    Brett StansfieldBrett Stansfield
    Feb 2, 2005 at 3:17 am
    Mar 26, 2005 at 10:00 am
  • Hi! Is it possible to easily cut & paste data from an Excel spreadsheet to an R edit( ) grid or to variable? It seems that R cannot handle the cell delimiters Excel hands over. Regards, Werner
    Werner WernersenWerner Wernersen
    Feb 16, 2005 at 8:59 am
    Sep 30, 2005 at 12:48 pm
  • Dear R-help.. I am rather new in R so i would appreciate your help in my problem.. I cant seem to be able to write a function that has arguments being objects and column names of these ojbects... A ...
    Achilleas PsomasAchilleas Psomas
    Feb 9, 2005 at 4:15 pm
    Apr 15, 2005 at 12:11 pm
  • Hello! Those of you, who use Sweave a lot, will probably find my shell script usable. You can get it at: http://www.bfro.uni-lj.si/MR/ggorjan/programs/shell/Sweave.sh No warranty, however don't ...
    Gregor GORJANCGregor GORJANC
    Feb 22, 2005 at 1:29 pm
    Feb 23, 2005 at 3:31 pm
  • Hi, I have two catagorical vectors like this; x = c(1, 2, 4, 2, 1) y = c(2, 4, 2 ,4, 1) I want to set up a barplot with the catagories 1-4 horizontally and number of occurances vertically for each ...
    T PetersenT Petersen
    Feb 18, 2005 at 5:14 am
    Feb 18, 2005 at 4:41 pm
  • Hello! I was just wondering if Sweave can work with \input or \include LaTeX commands. So, is it aware of such a possible hierarchy in documents. I would test that, but I don't have such a report ...
    Gorjanc GregorGorjanc Gregor
    Feb 23, 2005 at 3:50 pm
    May 24, 2005 at 8:36 pm
  • Hello, I apologize for this question that may has been asked a lot of times but I could not go through it. I create a multivariate time series containing NA values. I want to compute a linear ...
    Matthieu CornecMatthieu Cornec
    Feb 18, 2005 at 4:35 pm
    Mar 4, 2005 at 2:10 pm
  • Dear R users, Following some of the recent questions and discussions about the R plotting abilities, it occurred to me again that it would be very valuable to have an R graph gallery. Eric Lecoutre ...
    Sander OomSander Oom
    Feb 18, 2005 at 1:33 pm
    Feb 26, 2005 at 5:55 pm
  • I have data like: a <- rnorm(20000) b <- rep(FALSE,20000) b[sample(1:20000,15000)] <- TRUE Using Lattice graphics, I can produce two side-by-side histograms quite easily by: histogram(a | b) However, ...
    Sean DavisSean Davis
    Feb 2, 2005 at 1:42 pm
    Feb 3, 2005 at 2:08 am
  • Hi, Just a quick query - if I'm creating a function to produce a number of histograms per page of output (one per column from a matrix), how can I pass the column name of the matrix into the title ...
    Laura QuinnLaura Quinn
    Feb 16, 2005 at 1:56 pm
    Feb 16, 2005 at 5:51 pm
  • I am trying to extract rows from a data.frame based on the presence/absence of a single value in any column. I've figured out how to do get the positive matches, but the remainder (rows without this ...
    Tim HowardTim Howard
    Feb 3, 2005 at 7:57 pm
    Feb 7, 2005 at 1:47 pm
  • Hi! I have browsed the help archives but did not find anything on the subject: How to make publication quality graphs with R best? Is there some document about that topic out there? The problem is ...
    Werner WernersenWerner Wernersen
    Feb 28, 2005 at 11:27 pm
    Apr 14, 2005 at 2:33 am
  • Dear R friends My goal is to eliminate this specific group(1) if the # of NAs in this group greater than 50%(specifically say greater than 3). Would you please show me how to do it. I have a sample ...
    Feb 17, 2005 at 8:54 pm
    Feb 23, 2005 at 8:17 pm
  • Hi all. I'm working with a short plot (3x3 inches), but the results (via postscript command) are not nice. The lwd command don't affect the lines (that are very large) and the margins don't change ...
    Cézar FreitasCézar Freitas
    Feb 17, 2005 at 11:07 am
    Feb 17, 2005 at 6:00 pm
  • i'd like to use the C interface to R in a program i'm writing. as a starting point, i'm trying to create a very simple C program that uses R. i've read the R documentation on this, but i'm having ...
    Feb 4, 2005 at 7:37 pm
    Feb 9, 2005 at 10:50 pm
  • While writing a function that includes placing grid lines at the same position as the axis ticks, I found that the axis* functions don't return anything. Thus I have had to copy the appropriate ...
    Feb 23, 2005 at 11:08 pm
    Jun 22, 2005 at 2:18 pm
  • I am having trouble getting standard errors for contrasts using se.contrast() in what appears to be a simple case to me. The following test example illustrates my problem: Lab <- ...
    Jamie JarabekJamie Jarabek
    Feb 16, 2005 at 7:16 pm
    Feb 22, 2005 at 4:26 pm
  • Hi, I've collected quite a bit of elevation data (LIDAR elevation points) and am looking for a suitable platform to do analysis and modeling on it. The data is sitting in an Oracle database, one ...
    Thomas ColsonThomas Colson
    Feb 14, 2005 at 12:39 am
    Feb 16, 2005 at 1:19 pm
  • Hi, I run into a problem with "R CMD Rd2dvi" command: it gives me "File `Rd.sty' not found" error (See the output message on the bottom). I get the same error when running "RCMD check". My system ...
    Tuszynski, Jaroslaw W.Tuszynski, Jaroslaw W.
    Feb 10, 2005 at 9:07 pm
    Feb 16, 2005 at 8:02 am
  • I am trying to sample a subset from a matrix using sample. The size of the matrix is 20X 1532. It works fine with this, but when I transpose the matrix and try to sample it, it returns null ...
    T. Murlidharan NairT. Murlidharan Nair
    Feb 10, 2005 at 9:52 pm
    Feb 14, 2005 at 10:48 pm
  • I have a commonly recurring problem and wondered if folks would share tips. I routinely get tab-delimited text files that I need to read in. In very many cases, I get: Error in scan(file = file, what ...
    Sean DavisSean Davis
    Feb 25, 2005 at 8:11 pm
    Feb 26, 2005 at 8:45 pm
  • I'm trying to export a large data frame to a text file for permanent storage. The only thing I could find was the treeglia Package but that didn't work. Any suggestions? Thanks! Christina D Smith PhD ...
    Christina D SmithChristina D Smith
    Feb 18, 2005 at 5:32 pm
    Feb 22, 2005 at 12:52 am
  • Dear R users, Could somebody tell me why the grey color ramp is repeated in this graph, eventhough the ramp values go from 0 to 1? I must be missing something obvious, but I can not see it! z <- ...
    Sander OomSander Oom
    Feb 16, 2005 at 11:20 am
    Feb 16, 2005 at 4:33 pm
  • hello! this is a question, how can i specify the random part in the GLMM-call (of the lme4 library) for compound matrices just in the the same way as they defined in the lme-Call (of the nlme ...
    Pavel KhomskiPavel Khomski
    Feb 8, 2005 at 9:20 am
    Feb 10, 2005 at 7:41 am
  • Dear useRs I am looking for a way to randomise the values within a matrix: the conditions are that the sums of the rows and the sums of the columns should remain the same as in the original matrix ...
    Yann CloughYann Clough
    Feb 9, 2005 at 11:07 am
    Feb 9, 2005 at 3:26 pm
  • Hello everyone, I hope this is a fair enough question, but I don’t have access to a copy of Bates and Pinheiro. It is probably quite obvious but the answer might be of general interest. If I fit a ...
    Feb 1, 2005 at 6:53 pm
    Feb 2, 2005 at 6:45 pm
  • Hi, The R platform that I installed on my Windows XP crashes everytime that I try to run some sophisticated graphics (e.g. Demo Graphics). Is that to do with the configuration? Shall I reinstall it? ...
    Cedric GinestetCedric Ginestet
    Feb 22, 2005 at 4:50 pm
    Feb 25, 2005 at 7:33 pm
  • Why doesn't R have one, like "." in Perl or juxtaposition in awk? It does not seem impossible to introduce one, if that would be reasonable. It would seem to involve adding a table entry to ...
    Harris A. JaffeeHarris A. Jaffee
    Feb 24, 2005 at 8:20 pm
    Feb 25, 2005 at 7:48 am
  • Hi, I'm currently working on porting some SAS scripts to R, and hence need to do the same calculation (and get the same results) as SAS in order to make the transition easier for users of the ...
    Bela BauerBela Bauer
    Feb 18, 2005 at 8:05 am
    Feb 22, 2005 at 4:52 pm
  • Hello, still I have difficulties with variable names in functions. I know the famous example form help for deparse/substitute but I will give a simpler one to explain my problem. I know from Reid ...
    Heinz TuechlerHeinz Tuechler
    Feb 17, 2005 at 10:30 am
    Feb 18, 2005 at 2:05 am
  • Hi We have touched on this before, but I don't think I quite got it right. So I have a list, each element of which is a a vector of 2 numbers: $cat000_a01 [1] 0.3429944 4.5138244 $cat000_a02 [1] ...
    michael watson (IAH-C)michael watson (IAH-C)
    Feb 17, 2005 at 2:36 pm
    Feb 17, 2005 at 4:58 pm
  • In a multiple linear regression with two independent variables is there any function in R to test for the coefficients being different than some given values? Example: x1<-rnorm(100) x2<-rnorm(100) ...
    Manuel GutierrezManuel Gutierrez
    Feb 10, 2005 at 6:36 pm
    Feb 11, 2005 at 4:16 pm
  • Hi I have some panel data for the 50 US states over about 25 years, and I would like to test a simple model via OLS, using this data. I know how to run OLS in R, and I think I can see how to create ...
    David Hugh-JonesDavid Hugh-Jones
    Feb 10, 2005 at 5:15 pm
    Feb 11, 2005 at 3:15 pm
  • Hello, applying a function to a list of variables I face the following problem: Let's say I want to compute tables for several variables. I could write a command for every single table, like ...
    Heinz TuechlerHeinz Tuechler
    Feb 8, 2005 at 4:45 pm
    Feb 9, 2005 at 7:18 am
  • Hi all: I have a question on how to go about creating a correlation matrix. I have a huge amount of data....21 variables for 3471 times. I want to see how each of the variables correlate to each ...
    Jessica HiggsJessica Higgs
    Feb 7, 2005 at 3:58 pm
    Feb 7, 2005 at 6:21 pm
  • Hello, I develop some R package on Linux machine with C subroutines. The programs in C are well compiled on Linux machine and so I have some ".so" files. Now, I want to do the same work on windows, ...
    Depire AlexandreDepire Alexandre
    Feb 4, 2005 at 4:02 pm
    Feb 4, 2005 at 6:27 pm
  • Hello. I have what I know to be a simple question, but never having done anything like this it is pretty tough. I'm trying to write an R package. I have a collection of functions that I loaded into R ...
    Feb 15, 2005 at 9:32 pm
    Mar 2, 2005 at 12:17 am
  • Hi, Just something I don't understand: data <- data.frame(V1=c(1:12),F1=c(rep("a",4),rep("b",4),rep("c",4))) data_ac <- data[which(data$F1 !="b"), ] levels(data_ac$F1) Why the level "b" is always ...
    Lefebure TristanLefebure Tristan
    Feb 28, 2005 at 1:07 pm
    Feb 28, 2005 at 2:18 pm
  • hi all i have a function that uses two inputs, say xdata and ydata. An example is the following, simple1<-function(xdata,ydata) { ofit<-lm(ydata~xdata) list(ofit) } say i use arbitray number for ...
    Clark AllanClark Allan
    Feb 24, 2005 at 9:16 am
    Feb 24, 2005 at 3:47 pm
  • Hi, I'm trying to establish a connection to a MySQL database, and am using the rodbc package for it. This is in a GNU/Debian Linux box, with the corresponding Debian unstable packages. I can login to ...
    Sebastian LuqueSebastian Luque
    Feb 22, 2005 at 1:18 am
    Feb 22, 2005 at 12:18 pm
  • Howdy What I 'd like to analyze with a large data on building permits is to find time series effect of urban policy on buildings as well as cross-sectional effects in any. In 1990 the specialZone ...
    Kum-Hoe HwangKum-Hoe Hwang
    Feb 19, 2005 at 5:22 am
    Feb 20, 2005 at 10:30 pm
  • Dear R-users, Let me ask about the 'stack overflow' error which I got when I used the function 'combinations' in "gtools". The following is what I did: --------- library(gtools) ...
    Ho-Joon LeeHo-Joon Lee
    Feb 14, 2005 at 2:47 pm
    Feb 14, 2005 at 5:44 pm
  • Hello world, I am actually transferring a course in data management for students in biology, geography and agriculture from statistica to R - it works surprisingly well. If anyone is interested in my ...
    Georg HoermannGeorg Hoermann
    Feb 10, 2005 at 10:01 am
    Feb 10, 2005 at 8:26 pm
  • Is there any way to control the spacing between bars in a histogram, or change the border width (I'm assuming the hist() function, though alternatives are welcome)? I'm interested in changing the ...
    Thomas HopperThomas Hopper
    Feb 9, 2005 at 3:02 pm
    Feb 10, 2005 at 11:03 am
  • Hi, I'm using glm function to do logistic regression and now I want to know if it exists a kind of R-squared with this function in order to check the model. Thank you.
    Helene DryssensHelene Dryssens
    Feb 8, 2005 at 10:15 am
    Feb 9, 2005 at 12:24 am
  • Dear R-help, Has anyone tried running R on a Beowulf-type cluster? I can get R to run in batch (using R CMD BATCH) on a cluster, but am wondering if it is possible to get an interactive R session on ...
    Liaw, AndyLiaw, Andy
    Feb 7, 2005 at 7:59 pm
    Feb 8, 2005 at 3:29 pm
  • Hi I have a two-column integer matrix like this: R jj [,1] [,2] [1,] -1 1 [2,] -2 2 [3,] -7 6 [4,] -8 7 [5,] -6 5 [6,] -9 8 [7,] -5 4 [8,] 3 -3 [9,] -10 9 [10,] -4 3 I want a diagnostic that detects ...
    Robin HankinRobin Hankin
    Feb 7, 2005 at 8:14 am
    Feb 8, 2005 at 8:48 am
  • Dear R-list, I have many files on many CDs (probably same as many of you) and I would like to create a database containing only a few columns: - the name of the file - its extension - space occupied ...
    Adrian DusaAdrian Dusa
    Feb 6, 2005 at 12:02 pm
    Feb 7, 2005 at 10:18 pm
  • Frank Harrell suggested I re-post with information about the version of R Heres's the information: Here's what happens when I try to install: Professor Michael Kubovy University of Virginia ...
    Michael KubovyMichael Kubovy
    Feb 5, 2005 at 9:20 pm
    Feb 6, 2005 at 8:08 am
  • Hi Sorry to ask such a basic question. I have a list, each element of which is a vector of two values. What I actually want is a matrix with two columns, and one row per element of the list ...
    michael watson (IAH-C)michael watson (IAH-C)
    Feb 3, 2005 at 3:08 pm
    Feb 3, 2005 at 4:56 pm
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Prof Brian Ripley: 112 posts Uwe Ligges: 89 posts Gabor Grothendieck: 73 posts Peter Dalgaard: 56 posts Spencer Graves: 46 posts Liaw, Andy: 45 posts Adaikalavan Ramasamy: 29 posts Dimitris Rizopoulos: 26 posts Berton Gunter: 20 posts Deepayan Sarkar: 20 posts Petr Pikal: 20 posts John Fox: 18 posts Achim Zeileis: 17 posts Duncan Murdoch: 17 posts Marc Schwartz: 17 posts Thomas Lumley: 16 posts Heinz Tuechler: 14 posts michael watson (IAH-C): 14 posts Romain Francois: 14 posts Gregor GORJANC: 13 posts
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