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554 discussions - 1,899 posts

  • Dear lmer-ers, My thanks for all of you who are sharing your trials and tribulations publicly. I was hoping to elicit some feedback on my thoughts on denominator degrees of freedom for F ratios in ...
    Martin Henry H. StevensMartin Henry H. Stevens
    Sep 7, 2006 at 11:46 am
    Sep 18, 2006 at 6:09 pm
  • What ? ====== littler - Provides hash-bang (#!) capability for R (www.r-project.org) Why ? ===== GNU R, a language and environment for statistical computing and graphics, provides a wonderful system ...
    Jeffrey HornerJeffrey Horner
    Sep 26, 2006 at 5:04 pm
    Sep 27, 2006 at 12:22 pm
  • How can I read fixed column data (without a delimiter) from a large ASCII file directly into R? I want to read non-contiguous variables. I am trying to avoid reading it first into a DBMS and then ...
    Anupam TyagiAnupam Tyagi
    Sep 11, 2006 at 3:26 pm
    Sep 13, 2006 at 10:54 pm
  • Hello useRs! I have a small package and I need internet access for examples. Of course it works fine when I have internet access, but not otherwise. I remember I saw a way to test availability of ...
    Gregor GorjancGregor Gorjanc
    Sep 11, 2006 at 8:20 am
    Sep 13, 2006 at 9:28 am
  • I am trying to divide the columns of a matrix by the first row in the matrix. I have tried to get this using apply and I seem to be missing a concept regarding the apply w/o calling a function but ...
    Sep 6, 2006 at 3:48 pm
    Aug 27, 2007 at 9:27 pm
  • I would like to buy a basic statistics book (experimental design, sampling, ANOVA, regression, etc.) with examples in R. Or download it in PDF or html format. I went to the CRAN contributed ...
    Iuri GavronskiIuri Gavronski
    Sep 20, 2006 at 8:21 pm
    Sep 24, 2006 at 1:51 pm
  • HI, New to R and working through: http://www.cyclismo.org/tutorial/R/plotting.html I have: R for Mac OS X Aqua GUI written by: Simon Urbanek Stefano M. Iacus Version 1.16 (3198) This set of ...
    David ArnoldDavid Arnold
    Sep 9, 2006 at 6:45 pm
    Sep 20, 2006 at 4:48 pm
  • Hello, and sorry if this is already explained somewhere. I couldn't find anything. R (2.3.1, Windows) seems to perform some kind of lazy evaluation when evaluating defaults in function calls that, at ...
    Ulrich KellerUlrich Keller
    Sep 28, 2006 at 7:49 pm
    Sep 29, 2006 at 4:00 pm
  • Hello, I don't know if the result of acos(0.5) == pi/3 is a bug or not. It looks strange to me. Inaki Murillo
    Iñaki Murillo ArcosIñaki Murillo Arcos
    Sep 18, 2006 at 5:31 pm
    Sep 20, 2006 at 5:42 pm
  • A quick question please! How do you rename column names? i.e. V1 -- Apple; V2 -- Orange, etc. thx much ej
    Ethan JohnsonsEthan Johnsons
    Sep 11, 2006 at 4:49 pm
    Sep 12, 2006 at 5:52 pm
  • All, When I take a subset of a factor the reduced factor still maintains all the original levels of the factor when say forming the key in a plot. The data is correct, but the variable still ...
    Afshartous, DavidAfshartous, David
    Sep 12, 2006 at 3:22 pm
    Sep 12, 2006 at 5:23 pm
  • Fellow R-helpers, Suppose we create a histogram as follows (although it could be any vector with zeroes in it): R lenh <- hist(iris$Sepal.Length, br=seq(4, 8, 0.05)) R lenh$counts [1] 0 0 0 0 0 1 0 3 ...
    Sebastian P. LuqueSebastian P. Luque
    Sep 17, 2006 at 8:12 pm
    Sep 19, 2006 at 7:55 am
  • Hello Colleagues, I programmed in SAS for 3 years and would like to switch to a not so costly software product. Hence I started to evaluate R, and my first test look promising. However I have some ...
    Thorsten MuehgeThorsten Muehge
    Sep 13, 2006 at 10:18 am
    Sep 15, 2006 at 3:17 pm
  • Hi Given a real number x, I want to know how accurately R can represent numbers near x. In particular, I want to know the infinum of exactly representable numbers greater than x, and the supremum of ...
    Robin HankinRobin Hankin
    Sep 11, 2006 at 8:52 am
    Sep 11, 2006 at 3:31 pm
  • All, I'm trying to create an augPred plot in the nlme library, similar to the plot on p.43 of Pinheiro & Bates (Mixed Effects Models in S and S-Plus) for their Pixel data. My data structure is the ...
    Afshartous, DavidAfshartous, David
    Sep 7, 2006 at 10:17 pm
    Sep 11, 2006 at 1:09 pm
  • I have a data set called GQ1, which has 20 variables one of which is a factor called Status at thre levels "Expert", "Ecol" and "Stake" I have managed to evaluate some of the data split by status ...
    Graham SmithGraham Smith
    Sep 8, 2006 at 7:06 am
    Sep 8, 2006 at 11:38 am
  • Hi All: I was looking for, but could not locate in the packages, or in the R archive searches if there exists an R implementation of Cuzick's test of trend. The test is described as follows: An ...
    Arin basuArin basu
    Sep 2, 2006 at 1:52 pm
    Dec 23, 2011 at 5:55 pm
  • Dear R users: Is there a built-in and simple way to insert new columns after other columns in a dataframe? I.e. currently I have: V1 V2 V3 V4 [1,] [2,] Etc. But I want V1 V5 V2 V3 V4 [1,] [2,] Etc ...
    Jon MintonJon Minton
    Sep 13, 2006 at 9:13 pm
    Sep 29, 2006 at 6:18 am
  • Dear All, I'd like to know if it is possible to create animations with R. To be specific, I attach a code I am using for my research to plot some analytical results in 3D using the lattice package ...
    Lorenzo IsellaLorenzo Isella
    Sep 22, 2006 at 7:23 am
    Sep 26, 2006 at 8:05 am
  • Hello all, I have been a R user for about a year now, running on a MS Windows machine. I am in the process of making a complete switch to open-source. Linux is a new world to me. Ubuntu was my ...
    Brian EdwardBrian Edward
    Sep 19, 2006 at 10:27 pm
    Sep 20, 2006 at 4:45 pm
  • Hi I have a table called npl containing results of simulations. It contains about 19000 entries and the structure looks like this: NoPlants sim run year DensPlants 1 6 lng_cs99_renosterbos 1 4 ...
    Rainer M KrugRainer M Krug
    Sep 20, 2006 at 1:52 pm
    Sep 20, 2006 at 4:16 pm
  • Hi, 1. How do I construct 95% prediction interval for new x values, for example - x = 30000? 2. How do I construct 95% confidence interval? my dataframe is as follows : structure(list(y = c(26100000, ...
    Sachin JSachin J
    Sep 15, 2006 at 7:35 pm
    Sep 19, 2006 at 12:22 pm
  • Hi If string <- "xyz" f <- function(x){1 + sin(cos(x)) + exp(x^2)} How do I manipulate "string" and f() to give the string "1 + sin(cos(xyz)) + exp(xyz^2)" ? -- Robin Hankin Uncertainty Analyst ...
    Robin HankinRobin Hankin
    Sep 13, 2006 at 7:10 am
    Sep 13, 2006 at 11:44 am
  • Hi, Sorry for the question, I know it should be basic knowledge but I'm struggling for two hours now. How do I select only the first entry of each list member and ignore the rest? So for I only want ...
    Benjamin OttoBenjamin Otto
    Sep 29, 2006 at 3:59 pm
    Sep 30, 2006 at 2:37 pm
  • Hi All, I have a data with a variable like this: Column 1 "123abc" "12cd34" "1e23" ... Now I want to do an operation that can split it into two variables: Column 1 Column 2 Column 3 "123abc" 123 ...
    Frank DuanFrank Duan
    Sep 25, 2006 at 4:04 pm
    Sep 26, 2006 at 1:41 am
  • Suppose I have a square matrix P P <- matrix(c(.3,.7, .7, .3), ncol=2) I know that Returns the matrix product. Now, P^2 also returns the element by element product. But, is there a slick way to write ...
    Doran, HaroldDoran, Harold
    Sep 21, 2006 at 2:40 pm
    Sep 22, 2006 at 4:07 pm
  • Hi there, I have a dataframe whose elements are numbers or characters. I want to extract the frequencies of each elements in the dataframe. For example, d = as.data.frame(matrix(c(1, 2, 3, 3), 2,2)) ...
    Bingshan LiBingshan Li
    Sep 17, 2006 at 2:17 am
    Sep 18, 2006 at 3:47 pm
  • Hi, I am finding that I get quite different results when I interchange the following "equivalent" lines for sampling from a beta distribution in my r script. The rbeta line is correct judging by the ...
    Mark PinkertonMark Pinkerton
    Sep 14, 2006 at 5:42 pm
    Sep 15, 2006 at 1:19 pm
  • Hi, consider this: -------------- estr <- c("2^4", "alpha[1]") eexp <- expression(2^4, alpha[1]) ## Is it possible to get 'eexp' starting from 'estr'? The closest I could ## get was ...
    Deepayan SarkarDeepayan Sarkar
    Sep 14, 2006 at 7:31 pm
    Sep 14, 2006 at 8:40 pm
  • Dear All Is there some way of exporting R plots to epslatex, i.e., to a file with the eps file and another one with the LaTeX commands (representing the text in the plots), likewise Gnuplot does? If ...
    Paul SmithPaul Smith
    Sep 12, 2006 at 9:49 am
    Sep 13, 2006 at 5:13 pm
  • Hello! I have written an R script on a Windows platform where I calculate eight result matrices I plot using matplot. I would like to display the resulting plots successively, rather than ...
    Paternostro AmyPaternostro Amy
    Sep 11, 2006 at 8:19 pm
    Sep 12, 2006 at 6:18 am
  • Could somebody program this kind of plot type to R, if none exists, based on mds or correlation tables or some more suitable method? What do you think about idea? Does it work? None similar or better ...
    Sep 8, 2006 at 4:54 am
    Sep 11, 2006 at 1:18 pm
  • Dear r-help-list: If I use the rpart method like cfit<-rpart(y~.,data=data,...), what kind of tree is stored in cfit? Is it right that this tree is not pruned at all, that it is the full tree? If so, ...
    Sep 25, 2006 at 12:55 pm
    Sep 27, 2006 at 9:04 am
  • Dear list, My problem is to change the strip text of lattice panels when using two factors. I have a data frame with two factors: df <- expand.grid( "fact1"=c("y","b","r"), ...
    Rafael DuarteRafael Duarte
    Sep 22, 2006 at 7:36 pm
    Sep 26, 2006 at 9:47 pm
  • Hi all, How to store recursive resutls from a function for each step without using global operators <<-? Thanks ahead. Xiaohui Chen Dept. of Statistics UBC, Canada Don?t waste time standing in ...
    X.H ChenX.H Chen
    Sep 22, 2006 at 5:07 am
    Sep 22, 2006 at 4:19 pm
  • Dear list, Following advice posted to this list a while back by Prof Ripley [1], I have been trying to draw a per mille character [2] in an axis label. This should give the correct character ...
    Gavin SimpsonGavin Simpson
    Sep 19, 2006 at 4:29 pm
    Sep 20, 2006 at 7:54 pm
  • Thanks for pointing me out "aggregate", that works fine! There is one complication though: I have mixed types (numerical and character), So the matrix is of the form: A 1.0 200 ID1 A 3.0 800 ID1 A ...
    Emmanuel LevyEmmanuel Levy
    Sep 13, 2006 at 4:38 pm
    Sep 15, 2006 at 2:47 pm
  • Hello, I have made a barplot with some data and need a description below the x-axis. For example there are 20 values and I need a description "2003" for the first four values, then "2005" for the ...
    Christian OswaldChristian Oswald
    Sep 11, 2006 at 12:44 pm
    Sep 12, 2006 at 6:48 am
  • Hi I use the following code and it stores the results of density() in the list dr: dens <- function(run) { density( positions$X[positions$run==run], bw=3, cut=-2 ) } dr <- lapply(1:5, dens) but the ...
    Rainer M KrugRainer M Krug
    Sep 6, 2006 at 12:31 pm
    Sep 8, 2006 at 2:35 pm
  • Hello, I've decided to take the leap and try my hand at the lattice package, though I am getting stuck at what one might consider a trivial problem, plotting text at a point in a graph. Apologies in ...
    McGehee, RobertMcGehee, Robert
    Sep 29, 2006 at 6:17 pm
    Oct 5, 2006 at 11:47 pm
  • Hi, If I have a matrix , say a11 a12 a21 a22 Is there a routine to get: a11 a12 a11 a12 a21 a22 a21 a22 Thanks a lot for any help. best
    Tong WangTong Wang
    Sep 30, 2006 at 6:23 am
    Oct 1, 2006 at 5:06 am
  • In the process of moving a number of my scripts from MATLAB - R, I've discovered that there is no 'pure' equivalent of MATLAB's cell arrays, which I use quite often. Basically, I create matrices (as ...
    Evan CoochEvan Cooch
    Sep 27, 2006 at 4:07 pm
    Sep 27, 2006 at 5:46 pm
  • Hi I heard so much about Emacs and ESS that I decided to try it out - but I am stuck at the beginning. Is there anywhere a beginners manual for Emacs & ESS to be used with R? even M-x S tells me it ...
    Rainer M KrugRainer M Krug
    Sep 20, 2006 at 3:03 pm
    Sep 21, 2006 at 8:15 am
  • I'm testing a FC5 machine for use in a student lab. R 2.3.1 is installed and seems to work fine. There is one peculiarity - the logins are authenticating to a server, and a "verbose" flag is set ...
    Robert KingRobert King
    Sep 19, 2006 at 12:32 am
    Sep 20, 2006 at 3:02 pm
  • Hello: I'm trying to find some reading material about .a files. I'm attempting to build a package which accesses many C routines via .Call, and its been suggested that I need a lib_C_code.a file ...
    Sep 12, 2006 at 5:18 pm
    Sep 15, 2006 at 8:09 pm
  • Dear R experts, it would be very kind if you could help me with two wireplot problems. First, when I make a wireplot and transform it into an .eps using the postscript function the eps-file leaves ...
    Klaus NordhausenKlaus Nordhausen
    Sep 11, 2006 at 7:40 pm
    Sep 13, 2006 at 10:20 pm
  • Hi, Is there a function which operates on a matrix and return a vector of min/max of each rol/col ? say, X= 2, 1 3, 4 min.col(X)=c(2,1) thanks a lot. tong
    Tong WangTong Wang
    Sep 6, 2006 at 8:37 am
    Sep 6, 2006 at 9:14 am
  • I am wanting to use the "[" operator in an S-chunk, e.g. << = str(women) women$height women[,1] "["(women,1) @ to show the equivalence of three methods of extracting an element from a data.frame ...
    Ross DarnellRoss Darnell
    Sep 5, 2006 at 2:11 am
    Sep 5, 2006 at 11:46 am
  • Hi, are there any good charting and analysis tools for use with currencies, stocks, etc. in R? I have some tools to download currency data from the NYFRB using python and XML. Can we get and parse an ...
    Darren WeberDarren Weber
    Sep 17, 2006 at 9:37 pm
    Oct 22, 2006 at 5:25 am
  • What is the correct form to write statement meaning: if (a==1) {b=2; c=3}; else {b=0; c=0}; Thank you Jue Wang, Biostatistician Contracted Position for Preclinical & Research Biostatistics PrO ...
    Jue Wang2Jue Wang2
    Sep 29, 2006 at 10:50 pm
    Oct 1, 2006 at 1:37 am
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551 users for September 2006

Gabor Grothendieck: 119 posts Prof Brian Ripley: 89 posts David Barron: 63 posts Peter Dalgaard: 49 posts Anupam Tyagi: 47 posts Duncan Murdoch: 47 posts Marc Schwartz (via MN): 35 posts Spencer Graves: 32 posts Petr Pikal: 30 posts Uwe Ligges: 28 posts Dimitris Rizopoulos: 27 posts Deepayan Sarkar: 25 posts Jim holtman: 24 posts Douglas Bates: 20 posts Frank E Harrell Jr: 19 posts Hadley wickham: 18 posts Rainer M Krug: 18 posts Richard M. Heiberger: 17 posts Gregor Gorjanc: 15 posts Afshartous, David: 14 posts
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