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729 discussions - 2,256 posts

  • Hi, I have tuples of data in rows of a data.frame, each column is a variable for the 'items' (one per row). One of the variables is the 'size' of the item (row). I would like to cut my data.frame ...
    Dan BolserDan Bolser
    Mar 17, 2006 at 4:01 pm
    Mar 20, 2006 at 6:35 pm
  • a) How can I set the recording of all windows()-history forever to "true"? I want something like windows(record = TRUE) but not just for the window that opens then, but for all windows I will open ...
    Thomas SteinerThomas Steiner
    Mar 23, 2006 at 12:35 pm
    Mar 24, 2006 at 1:18 pm
  • Hi, and thanks in advance for your time. Background - I am working on a package and wish to have a routine's progress reported. The routine can take some time, and I would like to inform the user ...
    Jeffrey RacineJeffrey Racine
    Mar 17, 2006 at 2:44 pm
    Sep 28, 2006 at 1:58 pm
  • [Sorry about the duplicate posting; this one comes from the correct address. Please respond to me with any questions about this -- David.] Dear R-help readers, As Insightful announced at the DSC2005 ...
    David SmithDavid Smith
    Mar 29, 2006 at 8:04 pm
    Apr 1, 2006 at 5:51 pm
  • "[.ggobiDataset" <- function(x, ..., dropúLSE) { x <- as.data.frame(x) NextMethod("[", x) } "[[.ggobiDataset" <- function(x, ..., dropúLSE) { x <- as.data.frame(x) NextMethod("[[", x) } ...
    Hadley wickhamHadley wickham
    Mar 7, 2006 at 9:10 pm
    Mar 9, 2006 at 6:29 pm
  • Hi, There is rather large discrepancy in the size of the object as it lives in R and the size of the object when it is written to the disk. The object in question is an S4 of a homemade class "sa". I ...
    Steven LaceySteven Lacey
    Mar 25, 2006 at 12:32 pm
    Mar 28, 2006 at 10:53 pm
  • something like "sprintf" in C? so I can do: print(sprintf("the correct result is %3.4f\n", myresult)); ------- Also, I am desperately looking for a "clear console screen" function in R... thanks a ...
    MichaelMichael
    Mar 11, 2006 at 12:41 am
    Mar 12, 2006 at 6:28 pm
  • Hello all, I try use effects package. I have linear model: fit=lm(y~x*z) Then I need plot such as: y axis is y x axis is x plot lines for each level z. I use code ...
    NATALIA F TCHETCHERINANATALIA F TCHETCHERINA
    Mar 2, 2006 at 6:59 pm
    Mar 31, 2006 at 4:51 pm
  • Hi, It appears that deal does not support missing values (NA), so I need to remove them (NAs) from my data frame. how do I do this? (I am very new to R, so a detailed step-by-step explanation with ...
    Sam SteingoldSam Steingold
    Mar 17, 2006 at 8:17 pm
    Mar 21, 2006 at 12:59 pm
  • Hi All, I'm looking for some hints on idiomatic R usage using 'lapply' or similar. What follows is a simple example from which to generalize my question... # Suppose, in this simple example, I want ...
    John McHenryJohn McHenry
    Mar 13, 2006 at 6:37 pm
    Mar 14, 2006 at 5:41 pm
  • I can't get the PERL subexpression translated to R. Following, for example, B. Ripley's http://finzi.psych.upenn.edu/R/Rhelp02a/archive/58984.html I am using sub, but it looks like an ugly ...
    Dieter MenneDieter Menne
    Mar 25, 2006 at 4:22 pm
    Mar 26, 2006 at 9:00 am
  • Hi, Suppose I have an arbitrary function: arbfun<-function(x) {...} Is there a robust implementation of a numerical derivative routine in R which I can use to take it's derivative ? Something a bit ...
    Tolga UzunerTolga Uzuner
    Mar 12, 2006 at 4:14 pm
    Mar 14, 2006 at 10:15 am
  • Hi all, I am trying to play around with the randomForest function for classification. I know its performance is great. I am currently using the default options. It has many options. How do I further ...
    MichaelMichael
    Mar 8, 2006 at 1:39 am
    Mar 11, 2006 at 3:10 am
  • Suppose one has x <- c(1, 2, 7, 9, 14) y <- c(71, 72, 77) How would one write an R function which alternates between elements of one vector and the next? In other words, one wants z <- c(x[1], y[1], ...
    Ajay Narottam ShahAjay Narottam Shah
    Mar 6, 2006 at 2:14 am
    Mar 25, 2010 at 10:47 pm
  • Dear All, I have a data, suppose it is an N*M matrix data. All I want is to classify it into, let see, 3 classes. Which method(s) do you think is(are) appropriate for this purpose? Any reference will ...
    Baoqiang CaoBaoqiang Cao
    Mar 29, 2006 at 5:01 am
    Mar 30, 2006 at 10:20 am
  • Hello, I recently posted a question about my troubles with importing a lattice/trellis figure into latex. To recap, The figure contains 3 scatterplots, so it should have roughly a 1:3 sort of aspect ...
    Context greyContext grey
    Mar 15, 2006 at 1:28 am
    Mar 20, 2006 at 2:26 am
  • Hello. I have grown accustomed to the .Data directory in S-Plus and so when I came to R I continued that behaviour by saving my workspaces at the end of each R session. So, I have saved workspaces in ...
    Kevin E. ThorpeKevin E. Thorpe
    Mar 10, 2006 at 11:58 am
    Mar 10, 2006 at 7:20 pm
  • Hi all, I want to substract vector B from A's each column... how can R do that smartly without a loop? [,1] [,2] [,3] [1,] 2 4 6 [2,] 3 5 7 [,1] [1,] 1 [2,] 2 Error in A - B : non-conformable arrays
    MichaelMichael
    Mar 6, 2006 at 11:10 pm
    Mar 7, 2006 at 8:34 am
  • Hello! I am merging two datasets and I have encountered a problem with sort. Can someone please point me to my error. Here is the example. ## I have dataframes, first one with factor and second one ...
    Gregor GorjancGregor Gorjanc
    Mar 6, 2006 at 9:45 am
    Mar 6, 2006 at 10:30 pm
  • Hi, I am wondering where the library file for R's nmath routines are? Doing a search on libR gave me the following: /usr/lib/libRKC16.so.1.2.0 /usr/lib/libRKC.so.1.2.0 /usr/lib/R/lib/libRlapack.so ...
    Globe TrotterGlobe Trotter
    Mar 1, 2006 at 8:11 pm
    Mar 4, 2006 at 3:52 pm
  • Hi all, Are there any plans to add more functionality to command-line editing and history editing on the command line? In MATLAB (I know, comparisons are odious ...), you can type "p" and up-arrow on ...
    John McHenryJohn McHenry
    Mar 3, 2006 at 1:50 am
    Sep 29, 2007 at 9:36 pm
  • Dear All, I am working with skewed-t copula in my research recently, so I needed to write an mle procedure instead of using a standard fit one; I stick to the sn package. On subsamples of the entire ...
    Konrad BanachewiczKonrad Banachewicz
    Mar 28, 2006 at 9:41 am
    Mar 29, 2006 at 8:35 am
  • Dear friends, i have two dataset: A and B A: x y 1 2 3 4 B: m n 1 2 7 8 How to generate datasetC: C: x n 1 2 3 8 i know sas can do it easily, what about R? -- Kind Regards,
    Zhijie zhangZhijie zhang
    Mar 24, 2006 at 6:31 am
    Mar 25, 2006 at 3:36 am
  • Hi R-people: I need a function to compute the number of months between 2 dates, in the same way a mother would do it. For example, if a kid is born on February 6, the number of months between that ...
    Smith, PhilSmith, Phil
    Mar 10, 2006 at 6:20 pm
    Mar 23, 2006 at 12:48 pm
  • Hi to all, I initiate in R - Linux and I've some problems to find an editor with R interface as like RWinEdt for WinEdt. Anyone know one? Thanks in advance for your kind cooperation. Best regards ...
    Ana Patricia MartinsAna Patricia Martins
    Mar 10, 2006 at 4:52 pm
    Mar 11, 2006 at 7:58 am
  • The subject is debugging a program written in the R language,under Windows. (Sorry, but I do not know either the Apple OS or *nix.) A computer program will usually not work on the first try, if only ...
    Thomas L JonesThomas L Jones
    Mar 8, 2006 at 9:12 pm
    Mar 9, 2006 at 4:04 pm
  • Hi, If I use the levelplot function of the lattice library, I always see small "squares" in the plot. They indicate the region for which the same color is used. If you have a levelplot of a function ...
    Jan Marius HofertJan Marius Hofert
    Mar 4, 2006 at 4:22 pm
    Mar 7, 2006 at 7:09 am
  • Hi R-users, I am using arima to fit a time series. Now I would like to include an intervention component "It (0 before intervention, 1 after)" using different types of impacts, that is, not only ...
    BertaBerta
    Mar 1, 2006 at 11:40 am
    May 9, 2011 at 9:02 pm
  • Is there a global option somewhere that can completely disable the LazyLoad option? I want all my packages in source format for searching purposes, crippled by the conversion to database format ...
    Paul RoebuckPaul Roebuck
    Mar 31, 2006 at 10:15 pm
    Apr 3, 2006 at 6:17 am
  • Hi Is there a function which determines the location, i.e., index of the all minimums or maximums of a numeric vector. Which.min(x) only finds the (first) of such. [1] 11 but I need which.min(x) to ...
    Fred J.Fred J.
    Mar 15, 2006 at 7:32 pm
    Mar 20, 2006 at 8:18 am
  • Can someone please give me a pointer here. I have two matrices matA A B C 1 5 2 4 2 2 4 3 3 1 2 4 matB A B C 1 TRUE FALSE TRUE 2 FALSE TRUE TRUE 3 FALSE FALSE FALSE how do I extract all the values ...
    Tom wrightTom wright
    Mar 15, 2006 at 11:03 am
    Mar 15, 2006 at 4:06 pm
  • Hi, I was just trying to figure out how to beautify the output of my bwplot-output. Altogether I figured most of the things out on my own. The one thing which puzzles me though are the symbols for ...
    Vincent davidVincent david
    Mar 14, 2006 at 3:24 pm
    Mar 14, 2006 at 7:12 pm
  • After I have chosen a mirror, I get the following message : Warning message: no package 'car' at the repositories in: download.packages(pkgs, destdir = tmpd, available = available, I used the ...
    Jeremy MorrisJeremy Morris
    Mar 8, 2006 at 10:22 pm
    Mar 11, 2006 at 12:35 am
  • hello all, i'm forwarding this question for a colleague. "Is it possible to open a 2nd R Console?" regards, mark+ -- mark garey ucsf department of epidemiology and biostatistics division of ...
    Mark gareyMark garey
    Mar 10, 2006 at 1:05 am
    Mar 10, 2006 at 6:13 pm
  • The manual entry for as.POSIX says this about time zone codes... Usage as.POSIXct(x, tz = "") tz A timezone specification to be used for the conversion... but it fails to mention what these ...
    Jason HornJason Horn
    Mar 7, 2006 at 1:05 pm
    Mar 9, 2006 at 1:57 pm
  • Dear All, I'm trying to read a text data file that contains several records separated by a blank line. Each record starts with a row that contains it's ID and the number of rows for the records (two ...
    Arne MullerArne Muller
    Mar 8, 2006 at 11:32 am
    Mar 8, 2006 at 2:55 pm
  • How do I manipulate the read.table function to read in only the 2nd column???
    Mark salsburgMark salsburg
    Mar 7, 2006 at 9:29 pm
    Mar 7, 2006 at 10:15 pm
  • Hi all, I want to use "which.max" to identify the maximum in a 2D array/matrix and I want "argmin" and return the row and column indices. But "which.max" only works for vector... Is there any ...
    MichaelMichael
    Mar 7, 2006 at 4:55 am
    Mar 7, 2006 at 8:55 pm
  • Hi, The following function works, but is there a neater way to write it? f = function(x,...) { # return a character vector of the arguments passed in after 'x' gsub(" ...
    Matthew DowleMatthew Dowle
    Mar 2, 2006 at 4:34 pm
    Mar 2, 2006 at 6:42 pm
  • I've installed Ubuntu 5.10 Breezy on my Mac. When using MacOSX, I used to work with R 2.2.1, but now, with Ubuntu, I can't download it with synaptic. I can only download R 2.1.1-1, and I really need ...
    Florence DébarreFlorence Débarre
    Mar 1, 2006 at 7:44 am
    Mar 2, 2006 at 2:42 am
  • 1. You have levels(A) as "2" and "4", yet you showed equations for A=0 and A=1? 2. y = A + X + A*X means you're allowing the different groups of A to have different slopes. Probably not what you ...
    Liaw, AndyLiaw, Andy
    Mar 1, 2006 at 1:14 am
    Mar 1, 2006 at 1:43 pm
  • hello, I am using the ROC package to evaluate predictive models I have successfully plot the ROC curve, however ?is there anyway to obtain the value of operating point=optimal threshold value (i.e ...
    Anadon Herrera, Jose DanielAnadon Herrera, Jose Daniel
    Mar 31, 2006 at 9:58 am
    Mar 31, 2006 at 9:01 pm
  • Dear All, Could anyone explain me how it is possible that one factor in a glmmPQL model is non-significant according to the anova() function, whereas it turns out to be significant (or at least some ...
    I.SzentirmaiI.Szentirmai
    Mar 1, 2006 at 4:11 pm
    Mar 31, 2006 at 2:04 am
  • Hi all, Hi, When I want to compute the eigenvalues & eigenvectors of a specific matrix, R crashes (i.e. it stops responding to any input). I've tried it with different versions of R (2.1.1, 2.2.0, ...
    C.J.AlbersC.J.Albers
    Mar 28, 2006 at 4:01 pm
    Mar 30, 2006 at 10:40 am
  • Dear R users graphing with plot(x) seams to work for a small length(x), when length(x) is too large it seams to clutter the display, a solution would be to display subsets of x at a time, yet a ...
    Fred J.Fred J.
    Mar 27, 2006 at 8:04 pm
    Mar 29, 2006 at 5:08 pm
  • Dear R users, My situation: (1) I have limited workspace for my work harddisk (about 10 GiB). (2) I have a lot of data files in R workspace (*.RData) which most of them 200 MiB. For some reason I zip ...
    Muhammad SubiantoMuhammad Subianto
    Mar 29, 2006 at 9:44 am
    Mar 29, 2006 at 3:02 pm
  • Hi all, I have a questions regarding mixed effects models: I'm trying to plot e.g. fitted vs residuals for each level of the random effects, and i'm getting the same error. I guess this might be a ...
    Leonardo D BacigalupeLeonardo D Bacigalupe
    Mar 23, 2006 at 3:03 pm
    Mar 29, 2006 at 9:44 am
  • Hello! I am writing some numbers and character vectors to an ascii file and would like to get rid of [1] ... as shown bellow (a dummy example) R runif(20) [1] 0.653574 0.164053 0.036031 0.127208 ...
    Gregor GorjancGregor Gorjanc
    Mar 28, 2006 at 11:21 am
    Mar 28, 2006 at 11:08 pm
  • dear R wizards: X is factor with 20,000*20�0,000 observations of 20,000 factors. I.e., each factor has 20 observations. y is 800,000 normally distributed data points. I want to see how much R^2 the X ...
    Ivo welchIvo welch
    Mar 28, 2006 at 2:29 am
    Mar 28, 2006 at 2:44 pm
  • Hi, This may belong more to r-develop, but general discussion may be useful (for the how many-th time ?) seq(2,5,-2) seq(5,2,2) both result in Error in seq.default(2, 5, -2) : wrong sign in 'by' ...
    Christian HoffmannChristian Hoffmann
    Mar 27, 2006 at 9:41 am
    Mar 27, 2006 at 2:10 pm
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Gabor Grothendieck: 130 posts Prof Brian Ripley: 90 posts Liaw, Andy: 67 posts Uwe Ligges: 61 posts Spencer Graves: 57 posts Duncan Murdoch: 55 posts Michael: 38 posts Thomas Lumley: 38 posts Deepayan Sarkar: 28 posts Martin Maechler: 27 posts Peter Dalgaard: 27 posts Sean Davis: 27 posts Jacques VESLOT: 23 posts Berton Gunter: 22 posts Marc Schwartz (via MN): 22 posts Philippe Grosjean: 21 posts Roger Bivand: 21 posts Sundar Dorai-Raj: 20 posts Dieter Menne: 16 posts Fred J.: 16 posts
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