Grokbase Groups R r-help April 2007

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679 discussions - 2,146 posts

  • Dear All, The institute I work for is organizing an internal workshop for High Performance Computing (HPC). I am planning to attend it and talk a bit about fluid dynamics, but there is also quite a ...
    Lorenzo IsellaLorenzo Isella
    Apr 5, 2007 at 3:02 pm
    Apr 13, 2007 at 9:29 am
  • Erin HodgessErin Hodgess
    Apr 16, 2007 at 10:28 pm
    Nov 7, 2009 at 5:10 am
  • Hello, does anyone have experience with reading SPSS Version 15.0 files into R (version 2.4.1, WinXP)? I have long been sucessfully reading SPSS files with read.spss from the wonderful foreign ...
    RINNER HeinrichRINNER Heinrich
    Apr 5, 2007 at 11:57 am
    Apr 17, 2007 at 4:24 pm
  • Dear R-experts, It is a quite stupid question but please help me. I am very confuced. I am able to import normal txt ant mat-files to R but unable to import .xls-file I do not understand the online ...
    Schmitt, CorinnaSchmitt, Corinna
    Apr 18, 2007 at 2:10 pm
    Apr 24, 2007 at 8:00 am
  • I have 3 SAS files all in the directory F:/sas, two data files and a format file : form.ea1.sas7bdat form.ea2.sas7bdat sas.fmts.sas7bdat F is a USB. I am trying import them to R using "sas.get". I ...
    John KaneJohn Kane
    Apr 10, 2007 at 10:02 pm
    Apr 14, 2007 at 2:16 am
  • Hi, I have the file below called happyguys. It is a subset of data. How do I apply the weight variable (WTPP) to this file? Can i just multiply each column (except the first column because it is a ...
    Natalie O'TooleNatalie O'Toole
    Apr 27, 2007 at 5:05 pm
    May 1, 2007 at 12:56 pm
  • Dear All, The "clients.txt" file of the latest Rserve package, by Simon Urbanek, says, regarding its R client, "(...) a simple R client, i.e. it allows you to connect to Rserve from R itself. It is ...
    Ramon Diaz-UriarteRamon Diaz-Uriarte
    Apr 7, 2007 at 2:56 pm
    Apr 11, 2007 at 2:16 pm
  • Dear R-List, I have a great many files in a directory and I would like to replace in every file the character " by the character ' and in the same time, I have to change ' by '' (i.e. the character ' ...
    Laurent RhelpLaurent Rhelp
    Apr 6, 2007 at 7:12 pm
    Apr 8, 2007 at 12:08 pm
  • Dear R-helpers, I am planning a course on Statistical Computing and Computational Statistics for the Fall semester, aimed at first year Masters students in Statistics. Among the topics that I would ...
    Giovanni PetrisGiovanni Petris
    Apr 20, 2007 at 1:34 pm
    Apr 23, 2007 at 7:14 am
  • Dear R users, I am new to R and I would like to ask your help with the following topic. I have three sets of numeral data, 2 sets are paired and a third is independent of the other two. For each of ...
    Pedro A RechePedro A Reche
    Apr 17, 2007 at 8:52 am
    Apr 18, 2007 at 7:04 pm
  • Dear List, Below is a simple, standard loss model that takes into account the terms of an insurance policy: deductible <- 15 coverage.limit <- 75 insurance.threshold <- deductible + coverage.limit ...
    Apr 26, 2007 at 4:48 pm
    Apr 28, 2007 at 3:46 pm
  • Hi, I searched the archives and did not find a good solution to that. assume I have 10 sets and I want to have the common character elements of them. how could i do that? -- Weiwei Shi, Ph.D Research ...
    Weiwei ShiWeiwei Shi
    Apr 24, 2007 at 5:25 pm
    Apr 24, 2007 at 9:41 pm
  • Dear R-helpers, How do I tell panel.polygon what greoup and panel it applies to whithin xyplot(y ~ x | c, groups = g panel = function(x, y, groups, ...){ panel.polygon(x = xpol[c, g], y = ypol[c, g], ...
    Michael KubovyMichael Kubovy
    Apr 26, 2007 at 2:20 pm
    Apr 27, 2007 at 8:58 pm
  • Dear R-helpers, I have an xyplot of the following kind: xYplot(y ~ x | p, groups = factor(gg, levels = c('1', '5', '2', '4', '3')), strip = strip.custom( = 'g', factor.levels = c(1', '5', ...
    Michael KubovyMichael Kubovy
    Apr 10, 2007 at 10:21 pm
    Apr 21, 2007 at 8:31 pm
  • I tried to install the package "tseries" but could not do so. Any suggestions are welcome. I am using Ubuntu Linux and here is what I did: $ sudo R Then once in R, I did which gave a long list of ...
    Deepankar BasuDeepankar Basu
    Apr 19, 2007 at 8:04 pm
    Apr 20, 2007 at 3:16 am
  • Hi! Maybe this is a silly question, but I need the column rank ( of a matrix and R function 'rank()' only gives me the ordering of the elements of my matrix ...
    José Luis Aznarte M.José Luis Aznarte M.
    Apr 6, 2007 at 11:39 am
    Jul 24, 2007 at 9:35 pm
  • Dear R-Experts, here again a question concerning matlab. With the command "matrixM=[1 2 3;4 5 6]" a matrix under Matlab was constructed. It was than stored with the command ...
    Schmitt, CorinnaSchmitt, Corinna
    Apr 10, 2007 at 11:46 am
    Jun 28, 2007 at 3:39 pm
  • Hi, I have time series data stored in csv files (see below for an example of the data). I understand that in order to analyze my data in R, I need to first transform it into a ts object. Howeve, I ...
    Tom soyerTom soyer
    Apr 12, 2007 at 6:38 pm
    Apr 16, 2007 at 7:31 pm
  • Hi: I am doing some work that involves plotting points of interest superimposed on photographs and maps. I can produce the plots fine in R, but so far I have had to do the superimposition externally, ...
    Robert BiddleRobert Biddle
    Apr 11, 2007 at 1:39 pm
    Apr 12, 2007 at 2:05 pm
  • Hallo, does a package for Matlab exist in R? If yes, where can I find it and how can I install it under R? Thanks, Corinna
    Schmitt, CorinnaSchmitt, Corinna
    Apr 5, 2007 at 1:24 pm
    Apr 5, 2007 at 5:26 pm
  • Hello, I wanted to ask help about importing sas datasets. 1)I tried with some functions as read.ssd (foreign package), but it doesn't import the file if the length of the variables' names are longer ...
    A MartinoA Martino
    Apr 20, 2007 at 1:36 pm
    Apr 27, 2007 at 7:34 am
  • I am trying to maximise a complicated loglikelihood function with the "optim" command. Is there some way to get to know the estiamtes at each iteration? When I put "control=list(trace=TRUE)" as an ...
    Apr 23, 2007 at 4:21 am
    Apr 23, 2007 at 6:36 pm
  • Hi, I am trying to print out my confusion matrix after having created my random forest. I have put in this command: fit<-randomForest(MMS_ENABLED_HANDSET~.,data=dat,ntree=500,mtry=14, ...
    Ruben FeldmanRuben Feldman
    Apr 23, 2007 at 12:10 am
    Apr 23, 2007 at 5:23 pm
  • Dear R wizards---I read Brian Ripley's post from 2004 which said that it was not possible to print to STDERR. Alas, I have more modest needs. I was wondering if it was possible to just send a string ...
    Ivo welchIvo welch
    Apr 20, 2007 at 2:25 pm
    Apr 21, 2007 at 6:31 pm
  • Hi - I have a data frame with a large number of observations (62,000 rows, but only 2 columns - a character ID and a result list). Sample: id result 1 ID1 1 2 ID2 2 3 ID3 3 I have a list of ID ...
    Iestyn LewisIestyn Lewis
    Apr 20, 2007 at 4:29 pm
    Apr 20, 2007 at 9:20 pm
  • Hi, there: I am wondering if there is a quick way to "reverse" a list like this: t0 <- list(a=1, b=1, c=2, d=1) reverst t0 to t1 $`1` [1] "a" "b" "d" $`2` [1] "c" thanks. -- Weiwei Shi, Ph.D Research ...
    Weiwei ShiWeiwei Shi
    Apr 11, 2007 at 9:19 pm
    Apr 12, 2007 at 3:52 pm
  • I am using levelplot() from lattice with grids that have unequal cell sizes. This means that the boundary between two cells is not always half-way between nodes, as levelplot() assumes. The result is ...
    Waichler, Scott RWaichler, Scott R
    Apr 25, 2007 at 2:48 pm
    May 6, 2007 at 12:16 pm
  • Hey, Does anyone know of an equivalent to the LaTeX \perp (perpendicular) symbol for adding to R plots? Parallel is easy enough ("||"), but I haven't been able to find a way of adding perpendicular ...
    Matthew NeilsonMatthew Neilson
    Apr 28, 2007 at 4:15 pm
    May 1, 2007 at 7:07 am
  • I would like to be able to randomise presence-absence (i.e. binary) matrices whilst keeping both the row and column totals constant. Is there a function in R that would allow me to do this? I'm ...
    Nick CutlerNick Cutler
    Apr 27, 2007 at 8:45 am
    Apr 28, 2007 at 9:45 pm
  • Hey all, I'm trying to create a plot of two semi-transparent regions. The reason they need to be partially transparent is so that I can see if there's any overlap. Here's some example code: # BEGIN ...
    Matthew NeilsonMatthew Neilson
    Apr 27, 2007 at 3:58 am
    Apr 27, 2007 at 5:43 pm
  • Hi All R experts I have data in a two dimensional table. each row of the data adds upto 100 ( hence they are percentages ). it can be interpreted as like this A - I are the matches and P - X are the ...
    Apr 20, 2007 at 10:37 am
    Apr 25, 2007 at 1:45 pm
  • The Platform I am using R on is RHEL3. I run a bash script that collects data into many CSV files and have been processing them one at a time on my local machine with an excel macro. I would like to ...
    Apr 21, 2007 at 1:40 am
    Apr 25, 2007 at 1:34 am
  • Dear Help Desk, Is there any way to change some of the labels on R diagrams? Specifically in histograms, I would like to: 1. change the word frequency to count. 2. Make the font of the title ...
    Nima TehraniNima Tehrani
    Apr 21, 2007 at 7:03 pm
    Apr 23, 2007 at 1:22 pm
  • Something probably obivous but I don't see it. I needed to find the first 1 or two digits of some 5 and 6 digit numbers since they identified research sites while the rest of the number was the plot ...
    John KaneJohn Kane
    Apr 19, 2007 at 3:39 pm
    Apr 21, 2007 at 12:01 am
  • Hi everybody, I put some R-code to a web page for drawing fractals. See If you have some R-code for fractal images, I'm willing to include them to the page. Has ...
    Apr 13, 2007 at 6:39 am
    Apr 18, 2007 at 7:20 pm
  • I am working with transition matrices of sequences of animal behaviours. What I would like to do is parse the original matrices, adjusting row/column order so that the matrix has its main values in ...
    Richard RoweRichard Rowe
    Apr 4, 2007 at 6:34 am
    Apr 4, 2007 at 5:48 pm
  • My R code has got too complex to have a non-modular approach. Ive done some coding in other languages before, but I somehow cant figure out R's general rules for global and local variables. I have ...
    Apr 2, 2007 at 12:11 am
    Apr 4, 2007 at 3:45 am
  • Hi, I want to compute a distribution of the intersection of a graph and 'randomized' graphs induced by the permutations of node labels (to preserve the graph topology). Since I ll have many ...
    Nicolas bertinNicolas bertin
    Apr 24, 2007 at 7:03 am
    Sep 15, 2007 at 9:44 am
  • Greetings, This might be something very simple but a nice solution eludes me!! I have a function that I call within sapply that generates data frame in each call. Now when sapply returns me back the ...
    Ajit PawarAjit Pawar
    Apr 28, 2007 at 10:41 am
    Apr 30, 2007 at 3:53 pm
  • Dear R-helpers, I am using xtable package to prepare a Latex code of some R tables. Is this possible to have a greek symbols in xtable cells? How can I get for example a string of : $\Delta$ [1] ...
    Andris JankevicsAndris Jankevics
    Apr 16, 2007 at 3:14 pm
    Apr 29, 2007 at 7:29 pm
  • Hi, i am trying to read a .txt file, do a couple of select if statements on my data, and then finally use the ?table function to get frequency counts on the data. Specifically, i am looking at ...
    Natalie O'TooleNatalie O'Toole
    Apr 26, 2007 at 8:16 pm
    Apr 27, 2007 at 4:50 pm
  • Dera R users, I have written a function which computes variance, sd, r^2, R^2adj etc. But i am not able to return all of them in return statement. So how to return more than one variable from ...
    Vinod gulluVinod gullu
    Apr 20, 2007 at 11:30 am
    Apr 21, 2007 at 10:03 pm
  • Folks, I'm writing a gui wrapper around RODBC (having abandoned RMySQL) and some custom analysis scripts. I'm hoping that I could get some advice. All of my users will have access to a database ...
    Pete CapPete Cap
    Apr 16, 2007 at 3:10 pm
    Apr 21, 2007 at 9:51 am
  • Hello, can anybody tell me a easy way to change the mode of an "aggregate list" to "numeric"? I found a solution but I looks cruel. Thank's Felix PS: In the past you have asked what I am doing. I ...
    Felix WaveFelix Wave
    Apr 20, 2007 at 11:17 am
    Apr 20, 2007 at 2:59 pm
  • Consider the code: x <- seq(0,1,0.2) y <- seq(0,1,0.01) cbind(match(y,x),y) which, surprisingly, doesn't show a match at 0.6! (It gives correct matches at 0, 0.2, 0.4, 0.8 and 1, though) In addition, ...
    Bernhard KlingenbergBernhard Klingenberg
    Apr 19, 2007 at 1:02 am
    Apr 20, 2007 at 12:28 am
  • hie.. how can i write a loop that makes algorithm keeps repeating until a solution is converged?do i use a for loop? i know that we can use for loop to ask for a number of repetitions, but how to use ...
    Apr 19, 2007 at 12:00 pm
    Apr 19, 2007 at 2:31 pm
  • I have problems with Tcl/Tk in R 2.4.1, when running it on Windows Vista (see error message below). Regards, Sofia Loading Tcl/Tk interface ... Error in fun(...) : Can't find a usable init.tcl in the ...
    Sofia WikströmSofia Wikström
    Apr 17, 2007 at 11:32 am
    Apr 18, 2007 at 3:02 pm
  • Hi R-helpers, I wish to produce frequency histograms of all of the variables in my dataframe (except some identifying variables). I have tried to produce histograms of the 3rd through 20th variables ...
    Apr 16, 2007 at 9:20 pm
    Apr 17, 2007 at 6:00 am
  • Hi All, I have a netcdf gridded file with LCC projection. I can easily use image.plot to visualize it. However, as the axises are in X,Y, not Lat and Lon, I could not add state or country maps onto ...
    Linda SmithLinda Smith
    Apr 4, 2007 at 10:53 pm
    Apr 10, 2007 at 5:03 pm
  • Hello, For verbose coding I'd like to do something like: Is that possible? Thanks for any hints, Joh
    Johannes GraumannJohannes Graumann
    Apr 3, 2007 at 8:33 am
    Apr 3, 2007 at 4:18 pm
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648 users for April 2007

Prof Brian Ripley: 97 posts Gabor Grothendieck: 59 posts John Kane: 54 posts Jim holtman: 38 posts Greg Snow: 34 posts Schmitt, Corinna: 34 posts Peter Dalgaard: 31 posts Duncan Murdoch: 30 posts John Fox: 27 posts Deepayan Sarkar: 23 posts Petr Klasterecky: 22 posts Charilaos Skiadas: 21 posts Uwe Ligges: 21 posts Hadley wickham: 20 posts Douglas Bates: 19 posts Liaw, Andy: 18 posts Michael Kubovy: 18 posts Elyakhlifi mustapha: 17 posts Stephen Tucker: 17 posts Alberto Vieira Ferreira Monteiro: 16 posts
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