Grokbase Groups R r-help March 2004

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592 discussions - 1,954 posts

  • how to produce a Row Reduced Echelon Form for a matrix in R? Aimin Yan
    Aimin YanAimin Yan
    Mar 3, 2004 at 7:42 pm
    Mar 31, 2004 at 9:57 pm
  • I'm very new to R and utterly blown away by not only the language but the unbelievable set of packages and the documentation and the documentation standards and... I was an early APL user and never ...
    Bob CainBob Cain
    Mar 31, 2004 at 8:15 am
    Apr 13, 2004 at 12:14 pm
  • Consider the following example: # substitute a with b in the indicated function. Seems to work. function() b + 1 # z is an object of class call so use eval # to turn it into an object of class ...
    Gabor GrothendieckGabor Grothendieck
    Mar 18, 2004 at 1:10 am
    Mar 20, 2004 at 10:23 am
  • Hello, I want to call a function "fx" given by name, where some "global" variables (in the environment of fx) are passed to the function. For compatibility reasons I cannot modify the parameter list ...
    Thomas PetzoldtThomas Petzoldt
    Mar 10, 2004 at 4:05 pm
    Mar 12, 2004 at 9:43 am
  • Why does stop("we are done") print "Error in eval.with.vis(expr, envir, enclos) :" ? It would seem to me that a plain stop() is not an error, and that it would make more sense to have an error() ...
    Ivo welchIvo welch
    Mar 26, 2004 at 3:15 pm
    Mar 30, 2004 at 3:57 am
  • Dear R listers, When using smooth.spline to interpolate data, results are generally good. However, some cases produce totally unreasonable results. The data are values of pressure, temperature, and ...
    W. C. ThackerW. C. Thacker
    Mar 3, 2004 at 7:28 pm
    Mar 5, 2004 at 7:08 pm
  • Dear all, I am putting together a business case for R and I would like to know if there exist statistics on the distribution of R in academia, research and commercial institutions. The same ...
    Giovanni merolaGiovanni merola
    Mar 12, 2004 at 10:16 am
    Mar 22, 2004 at 10:10 pm
  • Dear list members, Can anyone tell me how the notches in boxplot(Y~X,notch=T) are calculated? What do these notches represent exactly? I?d suppose they are Conficence Intervals for the median, but ...
    Christoph ScherberChristoph Scherber
    Mar 1, 2004 at 4:45 pm
    Mar 2, 2004 at 5:31 pm
  • I have a data set that is comprised of, for simplicity, a vector of numbers that I want to march across in overlapping windows of say 10 values each, computing a couple of values for each window. Is ...
    Sean DavisSean Davis
    Mar 20, 2004 at 8:16 pm
    Mar 24, 2004 at 5:50 am
  • Dear R users, I want to share my joy with you. Please see the following excellent introduction to R "Statistiques avec R " by Vincent Zoonekynd In paticular, ...
    Shigeru MaseShigeru Mase
    Mar 4, 2004 at 11:36 am
    Mar 7, 2004 at 12:21 pm
  • Hello I have data in many files in a directory, how can I loop through the files in a given dir in-order-to build a data.frame? thanks
    Fred J.Fred J.
    Mar 19, 2004 at 9:29 pm
    Mar 6, 2008 at 5:32 pm
  • Hello Coming from matlab background, I could use some help on this one. I need to generate a data set based on this equation X(t) = 3.8x(t-1) (1-x(t-1)) + e(t), where e(t) is a N(0,0,001) random ...
    Fred J.Fred J.
    Mar 7, 2004 at 7:54 pm
    Mar 8, 2004 at 11:50 pm
  • Dear all, S-Plus has the function AggregateSeries() whose name is self explanatory. For instance one can derive monthly series from daily ones by specifying end-of-period, averages, sums, etc. I ...
    Ivan AlvesIvan Alves
    Mar 25, 2004 at 9:38 pm
    Mar 31, 2004 at 1:43 pm
  • This must be FAQ, but I can't find it in archives or with a site search. I am trying to construct a frequency table. I guess this should be done with table. Or perhaps factor and split. Or ...
    Kai HendryKai Hendry
    Mar 17, 2004 at 2:55 pm
    Mar 19, 2004 at 3:09 am
  • I am reading a list of numbers from my clipboard, and have been successful, except I can't make a histogram as R doesn't recognize my variable as numeric. I know I need to use "", but the ...
    Janet GannonJanet Gannon
    Mar 15, 2004 at 2:04 pm
    Mar 15, 2004 at 9:03 pm
  • Dear all I wrote a routine. At the end of each cycle of the loop I would like to save the result (plot) in a postcriptfile. Of course if I just use dev.print in the following way ...
    Mike CampanaMike Campana
    Mar 15, 2004 at 11:37 am
    Mar 15, 2004 at 3:18 pm
  • Dear R-helpers: I want to calculate area under a Receiver Operator Characteristic curve. Where can I find related functions? Thank you in advance Xiao
    Mar 11, 2004 at 6:16 pm
    Mar 12, 2004 at 1:45 pm
  • Dear list, following a previous querry we are still stuck! As pointed out by Erin Hodges the "ts" library includes a PACF function which reports the partial correlation of population density at time ...
    Scott NeweyScott Newey
    Mar 3, 2004 at 9:05 am
    Mar 4, 2004 at 7:33 am
  • Hello list, I have two vectors x and x2: x=runif(10) x2=runif(10) and one vectors with their names : my.names=c("x","x2") I would like to cbind these two vectors using their names contained in the ...
    Stephane DRAYStephane DRAY
    Mar 24, 2004 at 7:41 pm
    Mar 25, 2004 at 1:11 pm
  • Hi, how it's possible to extract the year and the number of days from Julian date. i'm little confused about the last two functions and ?years . EDATE comes from sqlQuery with EDATE <- ...
    Christian SchulzChristian Schulz
    Mar 8, 2004 at 2:50 pm
    Mar 10, 2004 at 11:35 am
  • Recently, I upgraded MiKTeX to the latest versions, and since then there are problems when I try to build R and/or R packages. I tried to build R 1.9.0 beta and R 1.8.1 patched I am running Windows ...
    Erich NeuwirthErich Neuwirth
    Mar 28, 2004 at 11:03 am
    Mar 28, 2004 at 10:32 pm
  • Dear all, A journal in which we wanted our manuscript published requires the figures as a tiff, eps or PowerPoint formated. I tried converting .jpeg files to these formats but it looses its quality ...
    Sivakumar MohandassSivakumar Mohandass
    Mar 3, 2004 at 8:35 pm
    Mar 3, 2004 at 11:11 pm
  • Hello list, I have used scan function to import data into R. I have done some analysis and find strange results. I have found my problem : when importing data with scan, this can slightly modify the ...
    Stephane DRAYStephane DRAY
    Mar 31, 2004 at 5:24 pm
    Mar 31, 2004 at 9:55 pm
  • R: This stems from my curiosity about the previous thread about a request for glm.nb code. The issue of package licenses was brought up and I was hoping for some clarification on that. Using the ...
    Jason L HigbeeJason L Higbee
    Mar 30, 2004 at 2:51 pm
    Mar 30, 2004 at 11:51 pm
  • Hi there, No information was found which version of XFree86 get along with R. I could not compile R version 1.8.1 with XFree86 Here is error message. gcc -I. -I../../../src/include ...
    Susumu Tanimura/谷村 晋Susumu Tanimura/谷村 晋
    Mar 26, 2004 at 3:51 pm
    Mar 30, 2004 at 3:05 pm
  • Dear R people I came across a strange thing: sd(rep(0.01, 15)) #0 sd(rep(0.001, 15)) #4.489023e-19 sd(rep(0.00001, 15)) #0 sd(rep(0.00000001,15)) #1.712427e-24 sd(rep(0.01, 13)) #1.805557e-18 ...
    Andreas PaulingAndreas Pauling
    Mar 29, 2004 at 2:01 pm
    Mar 29, 2004 at 6:10 pm
  • Hi -- subject says all. I just want the code for that function, which I guess was in Venables and Ripley as early as 1994. Well, and for any of the sub-functions that glm.nb calls. I can't install ...
    J BrainardJ Brainard
    Mar 28, 2004 at 11:00 am
    Mar 29, 2004 at 1:40 pm
  • Hello, 1. The Situation : ------------------------ The stack traceback is not available when error ouccured in a try(....) -- test.R -------------------------------- f<-function(a){ return ( log(a) ) ...
    Mar 11, 2004 at 11:08 am
    Mar 15, 2004 at 1:58 pm
  • Hi R specialists, The na.omit.ts() method fails when the time series contains internal NA's. How can these automatically be removed? Error in na.omit.ts(as.ts(x)) : time series contains internal NAs ...
    Jan VerbesseltJan Verbesselt
    Mar 5, 2004 at 12:50 pm
    Mar 9, 2004 at 2:20 am
  • Hi, First of all, thanks for the efforts of all the developers and contributors - I'm very new to R and at the moment am just using it to create some graphics, but it seems to be quite powerful. I've ...
    Mark Van De VyverMark Van De Vyver
    Mar 3, 2004 at 3:10 am
    Mar 5, 2004 at 5:44 am
  • Dear All, I would like to ask the following: a colleague is using R 1.8.1 for Windows XP on his laptop. The keboard is the standard Italian layout, which is missing the ~ (tilde) key. For reasons ...
    Federico CalboliFederico Calboli
    Mar 30, 2004 at 11:24 am
    Mar 30, 2004 at 1:39 pm
  • hello, for my present project i need to use the data stored in a ca. 100mb stata dataset. when i import the data in R using: library("foreign") x<-read.dta("mydata.dta") i find that R needs a ...
    Edwin LeuvenEdwin Leuven
    Mar 29, 2004 at 12:14 pm
    Mar 29, 2004 at 11:16 pm
  • Hi, Could any one point me to the projection, and parameters if necessary, that would show each country/continent with it's area accurately refelcted on the plot? E.g. aitoff vs. albers vs. bonne ...
    Mark Van De VyverMark Van De Vyver
    Mar 4, 2004 at 6:38 am
    Mar 26, 2004 at 6:06 pm
  • Hi, Very so often when i am plotting something, doing a histogram, or whatever i am struggling to find out which are the numbers for different colors, palette names, types of lines, symbols, etc. Is ...
    Monica Palaseanu-LovejoyMonica Palaseanu-Lovejoy
    Mar 24, 2004 at 3:05 pm
    Mar 25, 2004 at 4:38 pm
  • Hi all, I just cannot think of how to do it: I want to take the first variable (column) of a data frame and regress it against all other variables. bla <- function (dat) { reg <- ...
    Christian HoffmannChristian Hoffmann
    Mar 24, 2004 at 3:50 pm
    Mar 25, 2004 at 12:12 pm
  • Rmpi is not currently available on CRAN, and I don't think it has been for a few months. It is available at Does anyone know its current status? A few months ...
    Ross BoylanRoss Boylan
    Mar 23, 2004 at 11:33 pm
    Mar 25, 2004 at 6:16 am
  • I was wondering, whether there is a way to have statistical significance test for cluster agreement. I know that I can use classAgreement() function to get Rand index, which will give me some ...
    Alexander Sirotkin [at Yahoo]Alexander Sirotkin [at Yahoo]
    Mar 23, 2004 at 11:27 pm
    Mar 25, 2004 at 3:00 am
  • I got bitten recently by the following behaviour of detach(); [1] ".GlobalEnv" "file:Junk" "package:methods" "package:ctest" [5] "package:mva" "package:modreg" "package:nls" "package:ts" [9] ...
    Rolf TurnerRolf Turner
    Mar 22, 2004 at 4:56 pm
    Mar 22, 2004 at 9:34 pm
  • Dear helpers Does R have a package that performs projection pursuit density estimation? Or anyone knows code in Matlab or C for example to do this? Thank you all Luis
    Mar 17, 2004 at 2:59 pm
    Mar 19, 2004 at 9:11 am
  • Dear R-devel, Has anyone seen this problem? We tried building R-1.8.1 (and R-1.9.0 alpha 2004-03-17) on an Irix 6.5 box using ./configure CC="cc -64" F77="f77 -64" --with-tcltk=no --enable-R-shlib ...
    Liaw, AndyLiaw, Andy
    Mar 17, 2004 at 5:13 pm
    Mar 17, 2004 at 11:54 pm
  • I am about to get a new machine at work - an IBM Intellistation with the Xeon 2.8 GB processor. It will run Windows 2000. I would like to install the proper ATLAS dll for this machine, but I am not ...
    Mar 12, 2004 at 5:02 pm
    Mar 13, 2004 at 9:22 am
  • Hello ... Using R-1.9.0 alpha, I'm having some problem getting a few packages to pass check under Windows - specifically with the 'missing link(s)' section of the package install phase. I started ...
    Jeff GentryJeff Gentry
    Mar 8, 2004 at 11:20 pm
    Mar 9, 2004 at 4:26 pm
  • Hi, I am facing the problem that I want to plot a histogram chart set freq to true and overlay with normal or weibull or exponential distribution curve. The sample code is shown as below ...
    WeiQiang LiWeiQiang Li
    Mar 1, 2004 at 9:18 am
    Mar 4, 2004 at 11:55 am
  • Hello I am running R 1.8.1 on a Windows platform I am attempting to fit an ordinal logistic regression model, using the polr function, as described in Venables and Ripley. But when I try model4 <- ...
    Peter FlomPeter Flom
    Mar 3, 2004 at 8:42 pm
    Mar 3, 2004 at 10:53 pm
  • The background: I'm trying to fit a Poisson-lognormal distrbutuion to some data. This is a way of modelling species abundances: N ~ Pois(lam) log(lam) ~ N(mu, sigma2) The number of individuals are ...
    Mar 2, 2004 at 8:55 am
    Mar 3, 2004 at 4:26 pm
  • SAS proc rank has ties options of high and low that would allow producing ranks of the type found in the sports pages, e.g., rank (c(1,1,2,2,2,2,3)) == 1 1 3 3 3 3 7 Could R support these ...
    White DenisWhite Denis
    Mar 30, 2004 at 8:25 pm
    Mar 31, 2004 at 1:33 am
  • I couldn't find any reference to this in the FAQ, but is it possible to sort a dataframe by multiple columns? I've created some code, similar to the following: nspr.code <- sp.results$sp.code[order( ...
    Jeff D. HamannJeff D. Hamann
    Mar 26, 2004 at 4:34 pm
    Mar 29, 2004 at 8:54 am
  • Hello! Maybe "frame" is not the right term in this context. I explain my problem by example code: fun2 <- function(objName, add) { ## the object "objName" should be increased by "add", ## but the ...
    Meinhard PlonerMeinhard Ploner
    Mar 23, 2004 at 11:17 am
    Mar 23, 2004 at 10:22 pm
  • Hi, I am planning to buy a new PC for computing simulations in R under Linux. I was searching the web/mailing list-archives for useful hints about the "optimal" choice of hardware - surprisingly I ...
    Amit GhoshAmit Ghosh
    Mar 23, 2004 at 9:24 am
    Mar 23, 2004 at 8:41 pm
  • I was wandering if anybody ever tried to compare the classification accuracy of nnet to other (rpart, tree, bagging) models. From what I know, there is no reason to expect a significant difference in ...
    Mar 13, 2004 at 9:06 pm
    Mar 18, 2004 at 1:52 pm
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523 users for March 2004

Prof Brian Ripley: 174 posts Gabor Grothendieck: 88 posts Liaw, Andy: 87 posts Uwe Ligges: 53 posts Peter Dalgaard: 52 posts Spencer Graves: 39 posts Marc Schwartz: 36 posts Thomas Lumley: 32 posts Duncan Murdoch: 28 posts Douglas Bates: 25 posts Fred J.: 25 posts Martin Maechler: 20 posts Andrew Robinson: 16 posts John Fox: 16 posts Kjetil: 15 posts Barry Rowlingson: 14 posts Rolf Turner: 13 posts Thomas Petzoldt: 13 posts Ajay Shah: 12 posts Chuck Cleland: 12 posts
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