Grokbase Groups R r-help June 2010

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944 discussions - 3,363 posts

  • Hi All, I've been fiddling around with various ways to estimate the popularity of R, SAS, SPSS, Stata, JMP, Minitab, Statistica, Systat, BMDP, S-PLUS, R-PLUS and Revolution R. It's not an easy task ...
    Muenchen, Robert A (Bob)Muenchen, Robert A (Bob)
    Jun 20, 2010 at 1:31 pm
    Jun 28, 2010 at 1:43 pm
  • Hi all, I have a distribution, and take a sample of it. Then I compare that sample with the mean of the population like here in "Wilcoxon signed rank test with continuity correction": Wilcoxon signed ...
    Atte TenkanenAtte Tenkanen
    Jun 23, 2010 at 8:27 pm
    Jun 27, 2010 at 2:47 am
  • Hi all, I have two questions. Can some one give some help? The first question is regarding the pair of operators "&" and "&&". What is the difference between the two? The second question is regarding ...
    Li liLi li
    Jun 16, 2010 at 10:33 pm
    Jun 19, 2010 at 11:32 am
  • Hello Where could I find examples on how to work with the time index in a timeseries or zoo series? Let say I've got this series DATA 1990-01-01 10:00:00 0.900 1990-01-01 10:01:00 0.910 1990-01-01 ...
    Jun 15, 2010 at 12:27 pm
    Jun 17, 2010 at 4:15 pm
  • Dear all, I am using the "mgcv" package by Simon Wood to estimate an additive mixed model in which I assume normal distribution for the residuals. I would like to test this model vs a standard ...
    Carlo FezziCarlo Fezzi
    Jun 16, 2010 at 7:33 pm
    Jun 22, 2010 at 1:47 pm
  • Hi I implemented the age-structure model in Gove et al (2002) in R, which is a nonlinear statistical model. However running the model in R was very slow. So Dave Fournier suggested to use the AD ...
    Benedikt GehrBenedikt Gehr
    Jun 16, 2010 at 5:35 am
    Jun 20, 2010 at 10:15 pm
  • Hi All, I am trying to run a loop that will have varying numbers of rows with each output. Previously I have had the same number of rows so I would use (and I appreciate that this will no doubt ...
    Jun 1, 2010 at 11:51 am
    Jun 2, 2010 at 10:16 am
  • Here it is: read.inputs<-function(infile) { for (counter in 1:length(input.list)) { seek(infile,where=0,origin='start') newline<-readLines(infile,n=1) while(length(newline) 0) { ...
    Cable, Samuel B Civ USAF AFMC AFRL/RVBXICable, Samuel B Civ USAF AFMC AFRL/RVBXI
    Jun 30, 2010 at 2:45 pm
    Jul 1, 2010 at 10:44 am
  • I am studying on statistical shape analysis, I wonder is there any way or package available that I can perform Euclidean Distance Matrix Analysis (EDMA I or EDMA II) in R... thanks Gokhan -- View ...
    Jun 24, 2010 at 11:40 am
    Jun 28, 2010 at 8:00 am
  • Hi fans, is it possible for a script to check if a library has been installed? I want to automatically install it if it is missing to avoid scripts to crash when running on a new machine... Ralf
    Ralf BRalf B
    Jun 24, 2010 at 7:25 pm
    Jun 25, 2010 at 5:19 am
  • Hi, I want to add a box at the bottom of a lattice window (device/page?). Lattice has drawn a nice group of panels with all the plots I need. How do I add my own summary text at the bottom (several ...
    Noah SilvermanNoah Silverman
    Jun 1, 2010 at 5:37 pm
    Jun 9, 2010 at 1:37 am
  • [1] FALSE I'd expected b being the largest, since we sum up the smallest numbers first. Instead, c is the largest, which is sum() applied to the vector ordered with largest numbers first. Can anyone ...
    Lasse KliemannLasse Kliemann
    Jun 24, 2010 at 8:08 pm
    Jul 4, 2010 at 6:00 pm
  • Hi - I am looping over a structural equation model for a variety of datasets. Occasionally, the model returns an error and the loop then breaks. I'd like to set a condition which says something like ...
    Paul ChatfieldPaul Chatfield
    Jun 24, 2010 at 8:31 am
    Jun 24, 2010 at 4:30 pm
  • Hi, there! I'm having kind this same problem but I want to display another plot of my data, which is a point with two arrows indicating ...
    Larissa LucenaLarissa Lucena
    Jun 9, 2010 at 2:29 pm
    Jun 21, 2010 at 6:52 am
  • Hello Prof. Harrell and dear R-help mailing list, I wish to perform a non-parametric repeated measures anova. If what I read online is true, this could be achieved using a mixed Ordinal Regression ...
    Tal GaliliTal Galili
    Jun 16, 2010 at 5:22 pm
    Jun 19, 2010 at 12:01 pm
  • Hello, I have been trying to get an ANOVA table for a linear model containing a single nested factor, two fixed factors and a covariate: carbonmean<-lm(C.Mean~ Mean.richness + Diversity + Zoop + ...
    Anita NarwaniAnita Narwani
    Jun 3, 2010 at 12:13 am
    Jun 6, 2010 at 1:25 pm
  • Hi, I am looking for a way to find the lower envelope of points on a plot, preferably specifying what percentage of points should be allowed to lie outside the envelope. There must be a ...
    Asha SharmaAsha Sharma
    Jun 30, 2010 at 6:05 pm
    Jul 1, 2010 at 8:52 pm
  • Dear colleagues, particularly academic ones, So I'm creating a Microsoft Word template for myself so that every time I teach a new course, I don't have to enter in the dates manually for each class ...
    Simon KissSimon Kiss
    Jun 29, 2010 at 10:22 am
    Jul 1, 2010 at 3:06 pm
  • Hi, Standard correlations (Pearson's, Spearman's, Kendall's Tau) do not accurately reflect how closely the model (GAM) fits the data. I was told that the accuracy of the correlation can be improved ...
    David JarvisDavid Jarvis
    Jun 18, 2010 at 11:54 pm
    Jun 19, 2010 at 11:27 pm
  • Dear all, good morning, I have a population, let say members are tagged with some simple number like 1,2,3,...20. I want to draw a sample with replacement of size 4 (say, can be more than 20 also) ...
    Somnath SomnathSomnath Somnath
    Jun 16, 2010 at 2:20 pm
    Jun 17, 2010 at 8:20 am
  • Hi, I would like to compare to regression models - each model has a different dependent variable. The first model uses a number that represents the learning curve for reward. The second model uses a ...
    Or DuekOr Duek
    Jun 9, 2010 at 3:19 pm
    Jun 10, 2010 at 12:28 pm
  • text() can draw text on a plot. Do we have a way/function to draw text with a box surround it? Thanks, -james
    Jun 2, 2010 at 10:57 pm
    Jun 9, 2010 at 11:18 pm
  • Dear colleagues, I teach statistics using SPSS. I want to use R instead. I hit on one problem and I need some quick advice. When I want to work with ordinal variables, in SPSS I can compute the ...
    Iasonas LamprianouIasonas Lamprianou
    Jun 3, 2010 at 12:25 pm
    Jun 4, 2010 at 11:34 am
  • can anyone tell me how to import a text file in R? the text file I want to import is a large file, about 800MB in size. Thanks in advance. I tried using the following ...
    Jun 3, 2010 at 11:32 am
    Jun 4, 2010 at 8:46 am
  • Hello, I have basic familiarity with Unix but by most standards a novice. I am trying to install R on a linux machine and am following the instructions in the R install and admin guide in terms of ...
    Jun 2, 2010 at 9:07 pm
    Jun 3, 2010 at 9:12 pm
  • Dear group, Here is my environment: [1] "DailyPL100419" "DailyPL100420" "DailyPL100421" "dd" "i" "l" "PLglobal" "Pos100416" "Pos100419" "Pos100420" "Pos100421" "position" [13] "result" "sel" ...
    arnaud Gabouryarnaud Gaboury
    Jun 2, 2010 at 2:24 pm
    Jun 2, 2010 at 3:28 pm
  • Dear R-tisans, I am trying to calculate the 12th root of a transition (square) matrix, but can't seem to obtain an accurate result. I realize that this post is laced with intimations of quantitative ...
    Corey GallonCorey Gallon
    Jun 18, 2010 at 6:01 am
    Nov 5, 2011 at 5:32 pm
  • Hi R users, How can I automatically export results and graphs to a file? Thanks in advance Pedro Mota Veiga -- View this message in context ...
    Pedro Mota VeigaPedro Mota Veiga
    Jun 25, 2010 at 3:58 pm
    Jul 2, 2010 at 8:00 am
  • Um texto embutido e sem conjunto de caracteres especificado foi limpo... Nome: n?o dispon?vel Url: <
    Pablo CerdeiraPablo Cerdeira
    Jun 30, 2010 at 12:42 am
    Jul 1, 2010 at 1:30 am
  • NOTE: I will provide data if necessary, but I didn't want clutter everyones mailbox All: I have a time series with level and temperature data for 11 sites for each of three bases. I will have to do ...
    Stephen sefickStephen sefick
    Jun 28, 2010 at 8:42 pm
    Jun 28, 2010 at 11:21 pm
  • Hi, I have a dataset which has a categorical variable "R",a count variable C (integer) and 4 or more numeric variables (A,T,W,H - integers) containing measures for "R". I would like to summarize each ...
    Jun 26, 2010 at 12:17 pm
    Jun 28, 2010 at 5:23 pm
  • I am a beginner in R, so please don't step on me if this is too simple. I have two data sets datax and datay for which I created a qqplot qqplot(datax,datay) but now I want a line that indicates the ...
    Ralf BRalf B
    Jun 24, 2010 at 9:44 pm
    Jun 25, 2010 at 4:02 pm
  • I have recently started a new job at an NHS hospital in Scotland. Since I took up this post 6 months ago I have had an ongoing dispute with the IT secutiry dept. who refuse to install R on my ...
    McAllister, GinaMcAllister, Gina
    Jun 17, 2010 at 9:28 am
    Jun 18, 2010 at 11:31 am
  • Hello, I'm facing a problem of optimization, I've already solved but I'm trying to find other answers to this problem to improve the solution. Well, to make it short: I have to set/install a number ...
    José E. LozanoJosé E. Lozano
    Jun 17, 2010 at 11:48 am
    Jun 18, 2010 at 8:21 am
  • I have two pairs of related vectors x1,y1 and x2,y2 I wish to do a test for differences in means of x1 and y1, ditto x2 and y2. I am getting odd results. I am not sure I am using 'pt' properly... I ...
    Worik RWorik R
    Jun 16, 2010 at 10:30 pm
    Jun 17, 2010 at 10:57 pm
  • Given a matrix of m*n, I want to reorder it as a vector, using a row major transpose. so: [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [1,] 1 2 3 4 5 6 7 8 [2,] 9 10 11 12 13 14 15 16 [3,] 17 18 19 20 21 ...
    Steven mosherSteven mosher
    Jun 5, 2010 at 6:12 pm
    Jun 16, 2010 at 7:41 am
  • Dear all I encountered strange problem with regexpr replacement I made this character object str <- "02.06.10 12:40 " chr "02.06.10 12:40 " I read in an object which seems to be quite similar chr ...
    Petr PIKALPetr PIKAL
    Jun 2, 2010 at 12:07 pm
    Jun 2, 2010 at 2:55 pm
  • Hi, I have the following problem: I have a large dataframe where each row is specified by two numerical value (one 1:25 and the other one large specific number (e.g. 203043)). I have a list of 60 ...
    Jun 30, 2010 at 10:15 am
    Jul 5, 2010 at 3:45 pm
  • Hi all, I am using the package "random forest" for random forest predictions. I like the package. However, I have fairly large data sets, and it can often take *hours* just to go through the ...
    Mike WilliamsonMike Williamson
    Jun 30, 2010 at 11:53 pm
    Jul 2, 2010 at 1:30 pm
  • Hello Nabble users, A question about having two y axes on a chart. I'm trying to show on the left (first) y axis a measure used in an experiment; the x axis shows the experiment number, that has been ...
    Jun 24, 2010 at 7:44 am
    Jul 1, 2010 at 12:42 am
  • I am trying to use optim() to minimize a sum-of-squared deviations function based upon four parameters. The basic function is defined as ... SPsse <- function(par,B,CPE,SSE.only=TRUE) { n <- ...
    Derek OgleDerek Ogle
    Jun 26, 2010 at 8:27 pm
    Jun 28, 2010 at 1:55 pm
  • Dear R users, I am trying to draw error bars in a bar plot, I use this code (tried many others which did not work): install.packages() library(gplots) y <-c(39.02, 46.42) se <- c(7.57,7.35) plot <- ...
    Rosario Garcia GilRosario Garcia Gil
    Jun 3, 2010 at 3:33 pm
    Jun 25, 2010 at 4:53 pm
  • Dear expRts, I have a character string, say a <- "print(9**2)". How do I execute the contents of the string, parsed as R code? Do I have to open a connection and use cat(a), and parse it at the other ...
    Johannes HuesingJohannes Huesing
    Jun 17, 2010 at 7:32 pm
    Jun 20, 2010 at 12:24 pm
  • Hi all, I'm having great trouble working with the Cforest (from the party package) and Random forest functions. Large data set seem to create very large model objects which means I cannot work with ...
    Matthew OKaneMatthew OKane
    Jun 10, 2010 at 10:36 am
    Jun 18, 2010 at 7:48 pm
  • Hello, I am using the recode() function in Rcmdr and the result is not what I expect so I am almost sure I did something wrong but what... [1] 0 0 0 0 0 1 1 1 1 1 Levels: 0 1 BUT Now I recode test$x ...
    Alain GuilletAlain Guillet
    Jun 15, 2010 at 2:57 pm
    Jun 16, 2010 at 1:03 pm
  • Hello, If I want to see how, say, apply function is written, how would I be able to do that? Just typing "apply" at the prompt does not work. Thank you for help! Sergey
    Sergey GoriatchevSergey Goriatchev
    Jun 15, 2010 at 12:20 pm
    Jun 15, 2010 at 1:10 pm
  • Hi, this is not R technical question per se. I know there are many excellent statisticians in this list, so here my questions: I have dataset with ~1800 observations and 50 independent variables, so ...
    Array chipArray chip
    Jun 14, 2010 at 3:20 am
    Jun 14, 2010 at 10:37 pm
  • Hi I am having problems with the rendering of scientific symbols (mu and degree) in my plots. Whenever I use these symbols they are rendered changed (mu is changed to the proportionality symbol and ...
    Eduardo J. ChicaEduardo J. Chica
    Jun 4, 2010 at 5:01 pm
    Jun 10, 2010 at 1:53 pm
  • Hello, I am having some trouble running a very simple example. I am running a logistic regression entering the SAME data set in two different forms and getting different values for the deviance ...
    Enrico ColosimoEnrico Colosimo
    Jun 8, 2010 at 12:10 pm
    Jun 9, 2010 at 5:51 am
  • Hello, I just installed R 2.11.0 on a 64 bit Linux machine: Red Hat Enterprise Linux Server release 5.5 (Tikanga) I am still in the learning process in terms of handling Unix and have used R on both ...
    Jun 4, 2010 at 3:31 pm
    Jun 4, 2010 at 9:30 pm
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