Grokbase Groups R r-help October 2008

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956 discussions - 3,034 posts

  • R-users At the moment I am teaching a course on the use of R for data analysis. Part of course requirements involves the transfer of results from R to something that resembles the APA (American ...
    Tom Backer JohnsenTom Backer Johnsen
    Oct 24, 2008 at 7:30 pm
    Oct 28, 2008 at 3:29 pm
  • Hi all, I have looked around for help on creating GUIs for R, but haven't found anything. I would be interested in any advice or webpages that have information on the best language, tutorials etc ...
    Wade WallWade Wall
    Oct 7, 2008 at 4:56 pm
    Oct 13, 2008 at 5:18 pm
  • Dear Mr Peter Dalgaard and Mr Dieter Menne, I sincerely thank you for helping me out with my problem. The thing is taht I already have calculated SENS = Gg / (Gg + Bg) = 89.97% and SPEC = Bb / (Bb + ...
    Maithili ShivaMaithili Shiva
    Oct 13, 2008 at 7:27 am
    Oct 16, 2008 at 11:49 am
  • Hi all, Please, how could I calculate the time that two time segments has in common? Is there any function to perform this calculation? For instance, given four POSIXlt objects.. ...
    [Ricardo Rodriguez] Your XEN ICT Team[Ricardo Rodriguez] Your XEN ICT Team
    Oct 1, 2008 at 4:48 pm
    Oct 4, 2008 at 11:06 pm
  • I am wondering if there is a better alternative than Excel for data storage that does not require database knowledge (I will eventually have to learn this, but it is not on my immediate todo list). I ...
    Stephen sefickStephen sefick
    Oct 20, 2008 at 6:27 pm
    Oct 22, 2008 at 5:32 am
  • Dear All, I learned about R during my studies at Cologne University of Applied Science. Now I work at Allianz Dresdner Bauspar AG and I would like to install R here too. Is there any license issues ...
    Freiberger, KatrinFreiberger, Katrin
    Oct 27, 2008 at 1:04 pm
    Oct 29, 2008 at 11:12 pm
  • Can anyone please tell whether there is any R function to act as "VEC" and "VECH" operator on Matrix? Yes of course, I can write a user-defined-function for that or else, I can put dim(mat) <- NULL ...
    Oct 23, 2008 at 5:47 pm
    Oct 23, 2008 at 11:55 pm
  • Hi, Is there a way to simulate a population with R and pull out m samples, each with n values for calculating m means? I need that kind of data to plot a graphic, demonstrating the central limit ...
    Jörg GroßJörg Groß
    Oct 15, 2008 at 7:48 pm
    Oct 21, 2008 at 3:36 pm
  • Hello, I'd appreciate a suggestion on how to construct plots (barplots?) that use means on the Y axis instead of density/count. I'd also like to use groups and plot error or confidence interval bars ...
    Michael JustMichael Just
    Oct 8, 2008 at 4:31 am
    Oct 9, 2008 at 12:22 pm
  • Um texto embutido e sem conjunto de caracteres especificado foi limpo... Nome: n?o dispon?vel Url: <
    Rodrigo AluizioRodrigo Aluizio
    Oct 3, 2008 at 4:14 pm
    Oct 7, 2008 at 9:49 pm
  • We've listed books we've recommended to our introductory R/R-PLUS courses attendees [1] If you'd like to recommend a book, email [2]sue at ...
    Oct 28, 2008 at 4:33 pm
    Oct 29, 2008 at 1:44 pm
  • Evening again folks: Bear with me while crow is consumed. I had asserted that 2.7.2 had dep = NA while prior installations had it turned on. Incorrect on my part. Dumped that version and stepped back ...
    Brian LunerganBrian Lunergan
    Oct 19, 2008 at 12:30 am
    Oct 21, 2008 at 6:19 pm
  • Hi! I am working on scorecard model and I have arrived at the regression equation. I have used logistic regression using R. My question is how do I validate this model? I do have hold out sample of ...
    Maithili ShivaMaithili Shiva
    Oct 7, 2008 at 12:22 pm
    Oct 8, 2008 at 3:21 am
  • Hello, I am trying to plot multiple histograms with the same scales, etc into one plot. The commands below produce a 3 page PDF with each histogram occupying the upper right quadrant. And use ...
    Michael JustMichael Just
    Oct 2, 2008 at 5:28 am
    Oct 7, 2008 at 9:10 pm
  • R pattern-matching and replacement functions are vectorized: they can operate on vectors of targets. However, they can only use one pattern and replacement. Here is code to apply a different pattern ...
    Thaden, John JThaden, John J
    Oct 7, 2008 at 7:58 pm
    Jul 29, 2015 at 9:42 pm
  • Hi, I have two tables: continent code code3 codenum country 1 EU AD AND 20 Andorra, Principality of 2 AS AE ARE 784 United Arab Emirates 3 AS AF AFG 4 Afghanistan, Islamic Republic of 4 NA AG ATG 28 ...
    Dr Eberhard W LisseDr Eberhard W Lisse
    Oct 24, 2008 at 3:01 pm
    Oct 26, 2008 at 7:47 am
  •  Dear R-helpers, hello I am seeking your help in somehow getting names of variables without quotes (" "). Let us say, we have a table with 3 variables V1, V2 and V3. After the table is read, I get ...
    Amarjit Singh SethiAmarjit Singh Sethi
    Oct 18, 2008 at 7:04 pm
    Oct 21, 2008 at 7:36 pm
  • Dear R users, is there a way to define the color of the title for the legend in lattice? The help page on xyplot has a lot of details on key options just as the new book, but no mentioning of a color ...
    Meesters, ErikMeesters, Erik
    Oct 15, 2008 at 12:26 pm
    Oct 17, 2008 at 6:28 am
  • Here is what I tried: optdata = read.csv("K:\\MerchantData\\RiskModel\\AutomatedRiskModel\\soptions.dat", header = FALSE, na.strings="") optdata attach(optdata) for (i in 1:length(V4) ) { x = ...
    Ted ByersTed Byers
    Oct 15, 2008 at 8:46 pm
    Oct 16, 2008 at 4:35 am
  • Assume that I have the dataframe "data1", which is listed at the end of this message. I want count the number of lines that each person has for each year. For example, the person with ID!3 has 15 ...
    Tom La BoneTom La Bone
    Oct 14, 2008 at 1:58 pm
    Oct 15, 2008 at 12:14 pm
  • Hi: I am working on a publication and I have heard about LaTEX but I haven't actually tried to learn about it until today. I've found a few examples but I can't actually make them work properly. I ...
    Felipe CarrilloFelipe Carrillo
    Oct 11, 2008 at 11:39 pm
    Oct 13, 2008 at 7:24 pm
  • Dear R-users, I did do a thorough search and read many articles and forum threads on the lme and lmer methods and their pitfalls and problems. I, being not a good statistician but a mere "user", came ...
    Julia S.Julia S.
    Oct 6, 2008 at 10:29 am
    Oct 9, 2008 at 8:13 am
  • Greetings R-wizards: For historical reasons I have filenames with the character "?" and have successfully used "\u00e2" in its place, with the hoped-for result on all my on-screen plots. However ...
    Charles Annis, P.E.Charles Annis, P.E.
    Oct 5, 2008 at 7:51 pm
    Oct 8, 2008 at 9:46 pm
  • Dear R-users I have some datasets, all left-censoring, and I would like to fit distributions to (weibull,exponential, etc..). I read one solution using the function survreg in the survival package ...
    Borja Soto VarelaBorja Soto Varela
    Oct 28, 2008 at 3:27 pm
    Nov 2, 2008 at 5:25 pm
  • given what ?identical says, i find the following odd: x = 1:10 y = 1:10 all.equal(x,y) [1] TRUE identical(x,y) [1] TRUE y[11] = 11 y = y[1:10] all.equal(x,y) [1] TRUE identical(x,y) [1] FALSE y [1] 1 ...
    Wacek KusnierczykWacek Kusnierczyk
    Oct 26, 2008 at 10:39 pm
    Nov 2, 2008 at 8:11 am
  • Dear all, How can I get the duplicated elements from a vector? For example, x <- c("yes", "no", "yes", "yes", "no", "not sure"), how can I filter out all the elements which occured =2 times? Thanks ...
    Leon YeeLeon Yee
    Oct 29, 2008 at 1:47 pm
    Oct 30, 2008 at 2:49 am
  • Hi R helpers, One rather statistical question? What would be the best startegy to shortlist thousands of continous variables automaticaly using R.... as the preparation for logistic regression ...
    Oct 13, 2008 at 9:07 pm
    Oct 21, 2008 at 1:46 am
  • I would like to produce a chart that looks like a Gantt chart (or shingle plot), but instead of tasks you have variable names and instead of start and finish dates you have an upper and lower numeric ...
    Graham SmithGraham Smith
    Oct 17, 2008 at 7:22 pm
    Oct 19, 2008 at 1:22 pm
  • All - When I plot something like a<-rnorm(5) b<-rnorm(5) plot(a,b,col = "red") points(10,-10) The last point is missing because it is out of range of the first plot. I just try to switch from Matlab ...
    Haoda FuHaoda Fu
    Oct 17, 2008 at 4:06 am
    Oct 17, 2008 at 5:14 pm
  • Hi: I'm still trying to figure out how use Sweave. Trying the example below I get the error message when texi2dvi is executed. Any ideas about how to make texi2dvi work? library(tools) Writing to ...
    Felipe CarrilloFelipe Carrillo
    Oct 16, 2008 at 2:18 pm
    Oct 17, 2008 at 2:52 pm
  • Hello fellow R sufferers, Is there a way to perform an appending operation in place? Currently, the way my pseudo-code goes is like this for (i in 1:1000) { if (some condition) { newRow <- ...
    Oct 15, 2008 at 8:05 pm
    Oct 16, 2008 at 11:14 pm
  • Getting the basic stuff to work is trivially simple. I can connect, and, for example, get everything in any given table. What I have yet to find is how to deal with parameterized queries or how to do ...
    Ted ByersTed Byers
    Oct 14, 2008 at 7:33 pm
    Oct 15, 2008 at 9:53 pm
  • Hello, I write most of my R code in excel and then paste it into R. I am wondering if there is a limit to how much I can paste? I want to paste about 19,000 lines of code should this work? I am doing ...
    Michael JustMichael Just
    Oct 14, 2008 at 6:02 pm
    Oct 15, 2008 at 2:36 pm
  • What is the difference when including or not including the intercept when using lm()? x.noint <- lm(weight ~ group - 1))# omitting intercept x <- lm(weight ~ group)) This has nothing to do with ...
    Michael JustMichael Just
    Oct 13, 2008 at 8:42 pm
    Oct 14, 2008 at 3:16 am
  • Hello, I don't understand the description / help-text for the numericDeriv() function. Why is there a new environment used? And what is meant with an environment here? Is it similar or the same as a ...
    Oliver BandelOliver Bandel
    Oct 12, 2008 at 11:24 am
    Oct 13, 2008 at 6:53 am
  • Hi friends, I need suggestions/directions on how to producing a waterfall plot for present extend of change in tumour size for a set of respondents in a study. Example of use of waterfall plot is in ...
    Philip Twumasi-AnkrahPhilip Twumasi-Ankrah
    Oct 31, 2008 at 4:25 pm
    Nov 1, 2008 at 5:07 pm
  • Dear all, I would be grateful if anyone can help me with the following: My aim is to compute explicitely the sum S=A+B where A=sum(exp(c_i/d)), i=1,...,n; B, c_i, and d are real numbers with ...
    Oct 24, 2008 at 4:42 pm
    Oct 28, 2008 at 7:06 pm
  • Hello, I have the following problem. I am running simulations on possible states of a set of agents (1=employed, 0=unemployed). I store these simulated time series in a matrix like the following, ...
    Mario LavezziMario Lavezzi
    Oct 27, 2008 at 9:38 am
    Oct 27, 2008 at 3:54 pm
  • Hi, I'm not very experienced with R and struggle with data selection from a long matrix with two columns. I want to cut out the data between x 0 and min(y). x y [1,] -10 10 [2,] -5 10 [3,] 0 10 [4,] ...
    Martin BallaschkMartin Ballaschk
    Oct 25, 2008 at 4:33 pm
    Oct 27, 2008 at 11:54 am
  • Hi, I am a R user, with some experience in MacOS, Linux, etc, but I am having a problem that I cannot solve: I have a linux server (CentOS 5) and I installed sun jdk1.6. For instance: $ java -version ...
    Paulo CortezPaulo Cortez
    Oct 1, 2008 at 9:54 am
    Oct 23, 2008 at 6:15 am
  • Hi, I tried to install R 2.8 on Ubuntu Hardy via the Ubuntu mirroed repository. I tried to import the GPG key with: gpg --keyserver --recv-key E2A11821 but get the following error ...
    Renaud GaujouxRenaud Gaujoux
    Oct 22, 2008 at 1:42 pm
    Oct 22, 2008 at 4:28 pm
  • Hello - I am trying to create a pdf file in R, but I keep getting an error that says it cannot open the pdf device. Here is the code and output: Error in pdf(file = "test.pdf") : unable to start ...
    J danielJ daniel
    Oct 21, 2008 at 6:06 pm
    Oct 22, 2008 at 10:31 am
  • Hello, I was wondering if there was a way to only select cases my from data frame that contained a negative value? If I wanted to only use the rows that had a negative value in column d for my ...
    Michael JustMichael Just
    Oct 18, 2008 at 9:03 pm
    Oct 20, 2008 at 7:58 am
  • Dear all, I have a question about "union". "union" handles two vectors' elements to get their union, but I have many vectors and I want to get the union of all of them. So I wrote a loop: all <-c() ...
    Leon YeeLeon Yee
    Oct 17, 2008 at 10:23 am
    Oct 17, 2008 at 4:57 pm
  • R 2.7.2 Windows XP I am using apply to compute a series of Student's t-test from two matrices, sample1 and sample2. boo<-apply(sample1,1,t.test,sample2) I want to pick of the p-values from the tests, ...
    John SorkinJohn Sorkin
    Oct 16, 2008 at 12:01 pm
    Oct 16, 2008 at 4:19 pm
  • Hi Folks, I'm comparing some output from R with output from SPSS. The coefficients of the independent variables (which are all factors, each at 2 levels) are identical. However, R's Intercept (using ...
    Ted HardingTed Harding
    Oct 11, 2008 at 7:31 pm
    Oct 12, 2008 at 8:33 pm
  • I have 2 vecros : x<-c(100,96,88,100,100,96,80,68,92,96,88,92,68,84,84,88,72,88,72,88) x1 = sample(x, 5, replaceúLSE) Now i want to get remaining values of vector "x" those are not member of vector ...
    Megh DalMegh Dal
    Oct 11, 2008 at 7:25 pm
    Oct 11, 2008 at 8:14 pm
  • Dear R-ers, I'm using R 2.7.1 Mac OS. What is the best way for update to 2.7.2 to keep my previous libraries? Fredrik ######################## Fredrik Lundgren at Obs! ...
    Fredrik LundgrenFredrik Lundgren
    Oct 5, 2008 at 9:28 am
    Oct 5, 2008 at 3:44 pm
  • I'd like to control my namespace thoroughly, separated by task. Is there a way, in R session, to introduce namespaces for tasks dynamically and switch them as needed? Or, is there a combination of ...
    Alexy KhrabrovAlexy Khrabrov
    Oct 2, 2008 at 3:03 pm
    Oct 2, 2008 at 4:37 pm
  • Hello everybody, I'm a new user and I'm trying to use read.table with a tab delimited file but the system tells me (i) that there are more columns than column names, and (ii) that headers and ...
    Joan-Josep VallbéJoan-Josep Vallbé
    Oct 2, 2008 at 10:21 am
    Oct 2, 2008 at 1:30 pm
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794 users for October 2008

Gabor Grothendieck: 107 posts Prof Brian Ripley: 81 posts Greg Snow: 79 posts Duncan Murdoch: 69 posts Stephen sefick: 65 posts Jim holtman: 63 posts Dieter Menne: 58 posts Peter Dalgaard: 56 posts Hadley wickham: 46 posts Rolf Turner: 46 posts Ben Bolker: 37 posts Henrique Dallazuanna: 37 posts Michael Just: 37 posts Frank E Harrell Jr: 34 posts Jorge Ivan Velez: 31 posts Ted Harding: 27 posts Deepayan Sarkar: 26 posts Richard Cotton: 26 posts [Ricardo Rodriguez] Your XEN ICT Team: 24 posts Jim Lemon: 21 posts
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