Grokbase Groups R r-help March 2007

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719 discussions - 2,189 posts

  • As a big fan of Wikipedia, it's frustrating to see how little there is about R in the correlated project, the Wikibooks: Alberto Monteiro
    Alberto MonteiroAlberto Monteiro
    Mar 29, 2007 at 7:32 pm
    Mar 31, 2007 at 3:10 pm
  • Dear all, I search the mail list about this topic and learn that no simple way is available to get "lsmeans" in R as in SAS. Dr.John Fox and Dr.Frank E Harrell have given very useful information ...
    Xingwang YeXingwang Ye
    Mar 21, 2007 at 8:15 am
    Mar 24, 2007 at 1:02 am
  • Folks: In the past 2 days I have seen a large increase of spam getting into R-help. Are others experiencing this problem? If so, has there been some change to the spam filters on the R-servers? If ...
    Bert GunterBert Gunter
    Mar 6, 2007 at 4:23 pm
    Mar 10, 2007 at 4:20 pm
  • A colleague was asking me if R does multi-level modelling as opposed to multiple regression. Since I have no knowledge of multi-level modelling (except 5 minutes googling ) I thought that I would as ...
    John KaneJohn Kane
    Mar 28, 2007 at 4:48 pm
    Mar 29, 2007 at 9:02 pm
  • Hi, we are looking for a new workstation for big datasets/applications (easily up to 100'000 records and up to 300 Variables) using R. As an example: Variable Selection for a multivariate regression ...
    Sascha MorachSascha Morach
    Mar 15, 2007 at 10:30 am
    Mar 19, 2007 at 8:28 pm
  • Dear all, Suppose I have a very long expression e. Lets assume, for simplicity, that it is e = expression(u1+u2+u3) Now I wish to replace u2 with x and u3 with 1. I.e. the 'new' expression, after ...
    Daniel BergDaniel Berg
    Mar 27, 2007 at 1:56 pm
    Mar 29, 2007 at 6:39 am
  • Hi All Does R supports Vista Business and Vista Home Premium. I am planning to upgrade my system. Before that I just wanted to confirm whether R will work on Vista or not. Thanks for this help in ...
    Mar 28, 2007 at 10:57 am
    Mar 30, 2007 at 12:10 pm
  • Hi, I have a matrix HR(9x27). I would like to make a single vector with elements: t(HR[,1]) followed by t(HR[,2]) and then t(HR[,3] ... etc. Is there any neat way of converting this matrix into a ...
    A EzhilA Ezhil
    Mar 28, 2007 at 5:27 pm
    Mar 29, 2007 at 1:27 pm
  • Does anyone know if for clinical studies the FDA would accept statistical analyses performed with R ? Delphine Fontaine
    Delphine FontaineDelphine Fontaine
    Mar 9, 2007 at 1:29 pm
    Mar 23, 2007 at 4:41 pm
  • ? stato filtrato un testo allegato il cui set di caratteri non era indicato... Nome: non disponibile Url:
    Sergio Della FrancaSergio Della Franca
    Mar 28, 2007 at 2:21 pm
    Mar 31, 2007 at 10:51 am
  • Is there any generic function that gets the "home" directory? This should return /home/<user in Linux and x:/Documents and Settings/<user (or whatever) in Windows XP. Another (unrelated) question ...
    Alberto MonteiroAlberto Monteiro
    Mar 23, 2007 at 12:30 pm
    Mar 23, 2007 at 4:40 pm
  • Hi R-users, Following this post , how do I get last two rows (or six or ten) by id group out of the data frame? Here the example gives just the ...
    Lauri NikkinenLauri Nikkinen
    Mar 20, 2007 at 2:33 pm
    Mar 21, 2007 at 2:46 pm
  • Hi, As part of the legend to a plot, I need to have the "n" in italics because it is a requirement of the journal I aim to publish in: "This study, n = 3293" Presently I have: legend(20, 105, "This ...
    Chabot DenisChabot Denis
    Mar 18, 2007 at 2:01 am
    Mar 18, 2007 at 1:15 pm
  • Hi R-experts, I have data from four conditions of an experiment. I tried to create four subsets of the data with read.table, for example, read.table("Experiment.csv",subset=(condition=="1")) . I ...
    Gnv shqpGnv shqp
    Mar 11, 2007 at 11:13 pm
    Mar 13, 2007 at 10:49 am
  • Dear all, Is there an R equivalent to SAS's proc format? Best regards J. Lamack O Windows Live Spaces ? seu espa?o na internet com fotos (500 por m?s), blog e agora com rede social ...
    Lamack lamackLamack lamack
    Mar 6, 2007 at 5:48 pm
    Mar 7, 2007 at 3:07 pm
  • Um texto embutido e sem conjunto de caracteres especificado associado... Nome: n?o dispon?vel Url:
    Milton Cezar RibeiroMilton Cezar Ribeiro
    Mar 15, 2007 at 5:03 pm
    Jun 10, 2011 at 11:35 am
  • ? stato filtrato un testo allegato il cui set di caratteri non era indicato... Nome: non disponibile Url:
    Sergio Della FrancaSergio Della Franca
    Mar 23, 2007 at 4:27 pm
    Mar 26, 2007 at 8:14 pm
  • Dear Gurus, Using R 2.4.1 on Windows XP I am generating stacked barplots of age-composition of fish populations (Y) over time (X). As there are many years, not every bars is labeled. When looking at ...
    Michael H. PragerMichael H. Prager
    Mar 20, 2007 at 10:04 pm
    Mar 22, 2007 at 6:00 pm
  • Hi everyone, I am interested in estimating this type of random effects panel: y_it = x'_it * beta + u_it + e_it u_it = rho * u_it-1 + d_it rho belongs to (-1, 1) where: u and e are independent and ...
    Guillermo VillaGuillermo Villa
    Mar 16, 2007 at 11:44 am
    Mar 16, 2007 at 5:21 pm
  • I've seen how to replace the NA's in a single column with a data frame * mydata$ncigs[$ncigs)]<-0 *But this is just one column... I have thousands of columns (!) that I need to do this, ...
    David L. Van Brunt, Ph.D.David L. Van Brunt, Ph.D.
    Mar 15, 2007 at 12:22 am
    Mar 15, 2007 at 11:36 pm
  • List, I just left an environment where I was running R and mysql on CENTOS. At the time of install, RMySQL was available on CRAN. Later installs on Ubuntu were possible because it was available as a ...
    Pete CapPete Cap
    Mar 10, 2007 at 3:22 pm
    Mar 13, 2007 at 1:26 pm
  • First I wanted to thank both Marc Schwartz Greg Snow and for their reply. Then I needed to add a level of complexity to the problem. I would be able to create the biggest possible matrix. In other ...
    Bruno C.Bruno C.
    Mar 2, 2007 at 9:15 am
    Mar 10, 2007 at 12:04 am
  • Hi, I recieved an ascii file, containing following information: $$ Experiment Number: $$ Associated Data: FUNCTION 1 Scan 1 Retention Time 0.017 399.8112 184 399.8742 0 399.9372 152 .... Scan 2 ...
    Bart JoosenBart Joosen
    Mar 1, 2007 at 9:14 am
    Mar 5, 2007 at 4:27 pm
  • Hello! I have no problem reading Excel files (each worksheet in the file is a "table" which can be read - at least in my case). What I would like to do is to read such a table, change it (just the ...
    Moshe OlshanskyMoshe Olshansky
    Mar 23, 2007 at 8:06 am
    Mar 27, 2007 at 6:59 am
  • Hi, Consider the following (much simplified) Sweave example: -------------- First, we set the value of $x$: <<chunk1,evalúLSE x <- 1 @ Then we set the value of $y$: <<chunk2,evalúLSE y <- 2 @ Thus, ...
    Kevin R. CoombesKevin R. Coombes
    Mar 13, 2007 at 11:02 pm
    Mar 24, 2007 at 11:46 pm
  • Hi all, I am rather new to R. Recently I have been trying to implement some tree algorithms in R. I used lists to model tree nodes. I thought something like this would work: parent <- list(); child ...
    Yuk Lap Yip (Kevin)Yuk Lap Yip (Kevin)
    Mar 16, 2007 at 1:36 pm
    Mar 22, 2007 at 8:11 am
  • After successfully building R on Slackware Linux v11.0 I went to make the documentation; the texi files went fine and then I hopefully issued make dvi after having gotten the warning to the effect of ...
    Joel J. AdamsonJoel J. Adamson
    Mar 16, 2007 at 5:29 pm
    Mar 20, 2007 at 3:15 pm
  • Dear R Help, I have noticed some inconsistent behaviour of add1 and drop1 with a weighted linear model, which affects the interpretation of the results. I have these data to fit with a linear model, ...
    Jenny HodgsonJenny Hodgson
    Mar 13, 2007 at 3:43 pm
    Mar 14, 2007 at 12:08 am
  • Hi, My name is Laura. I'm a PhD student at Queen's University Belfast and have just started learning R. I was wondering if somebody could help me to see where I am going wrong in my code for ...
    Laura HillLaura Hill
    Mar 6, 2007 at 8:54 am
    Mar 13, 2007 at 10:37 pm
  • I have a daily time series and have two questions to get some help with. Firs,t I have dates in simple numeric values. e.g. ymd [1] 20050104 20050105 20050106 20050107 20050110 20050111 20050113 ...
    Young ChoYoung Cho
    Mar 12, 2007 at 10:42 pm
    Mar 13, 2007 at 5:24 pm
  • Hello, I try to handle a simple bar-plot, but it turns out to be not as simple as I thought. 1) I have created a .dat-File, e.g. test.dat: DATA DATA-SEM 2.2 0.32 6.2 1.30 12.7 1.61 48.6 3.08 4.1 0.86 ...
    Marc A. RohlingMarc A. Rohling
    Mar 1, 2007 at 1:56 pm
    Mar 2, 2007 at 9:38 pm
  • Hi there, is there a possibility to count the number of appearances of an element in a vector ? i mean of any given element.. deliver all elements which are exactly xtimes in this vector ? thx in ...
    Bunny , lautloscrew.comBunny ,
    Mar 1, 2007 at 2:20 pm
    Mar 1, 2007 at 7:55 pm
  • I'm not sure I'm barking up the right tree here, but would I need to make use of groups to plot two separate datasets within ONE panel in xyplot? The desired end result is a single xy plot of two ...
    Thomas ColsonThomas Colson
    Mar 27, 2007 at 9:51 pm
    Mar 27, 2007 at 9:51 pm
  • Hallo, I build a list by the following way: Lst = list(name="Fred", wife="Mary", no.children=3, cild.ages=c(4,7,9)) I know how I can extract the information one by one. But now I want to add a new ...
    Schmitt, CorinnaSchmitt, Corinna
    Mar 26, 2007 at 1:26 pm
    Mar 27, 2007 at 8:38 am
  • Hi. Is there a straightforward way to convert a character string containing comma-delimited numbers to a numeric vector? In my application, I use system(executable.string, intern=TRUE) which returns ...
    Robin HankinRobin Hankin
    Mar 19, 2007 at 9:18 am
    Mar 19, 2007 at 5:21 pm
  • Hello, I'm running an algorithm for graph structural cohesion that requires a depth-first search of subgraphs of a rather large network. The algorithm will necessarily be redundant in the subgraphs ...
    Peter McMahanPeter McMahan
    Mar 16, 2007 at 3:42 pm
    Mar 17, 2007 at 3:24 pm
  • This morning I tried to see if I could find the r-help mailing list on Google Groups, which has an interface that I like. I found three Google Groups ("The R Project for Statistical Computing", ...
    Paul LynchPaul Lynch
    Mar 14, 2007 at 3:48 pm
    Mar 15, 2007 at 12:50 pm
  • R-Experts: Does anyone know if there are R functions to perform the Freeman-Tukey double arcsine transformation and then backtransform it? Thanks, Brant Inman Mayo Clinic
    Inman, Brant A. M.D.Inman, Brant A. M.D.
    Mar 13, 2007 at 12:42 pm
    Mar 13, 2007 at 8:38 pm
  • Dear R users, I have a data frame (test) including five columns of upper (numeric), lower (numeric), observed (numeric), best_sim (numeric) and stname (factor with 80 levels, each level with ...
    Faramarzi MonirehFaramarzi Monireh
    Mar 7, 2007 at 8:39 am
    Mar 7, 2007 at 3:06 pm
  • Dear all, I would like to know if there is a simple way to generate random numbers with the constrain that they sum up to one. I am new using R... Thanks in advance, N?ria Acepta el reto MSN ...
    Núria MartínezNúria Martínez
    Mar 6, 2007 at 11:51 am
    Mar 6, 2007 at 10:01 pm
  • Hi R Users! Thanks in advance. I am using R 2.4.1 on windows XP. I have a series of (x[i,t], y[i,t]), say i = 1, 2, ......, n and t = t1, t2, ......, tT. The n is large in number. The series y[i,t] ...
    Deb MidyaDeb Midya
    Mar 5, 2007 at 10:37 am
    Nov 21, 2011 at 4:20 pm
  • Un texte encapsul? et encod? dans un jeu de caract?res inconnu a ?t? nettoy?... Nom : non disponible Url :
    Laurent ValdesLaurent Valdes
    Mar 31, 2007 at 12:40 pm
    Apr 3, 2007 at 8:05 am
  • Dear R experts, I was wondering if there are any R functions that give the tail area of a sum of chisquare distributions of the type: a_1 X_1 + a_2 X_2 where a_1 and a_2 are constants and X_1 and X_2 ...
    Klaus NordhausenKlaus Nordhausen
    Mar 29, 2007 at 7:46 am
    Mar 30, 2007 at 9:35 am
  • Hi everybody, recently I had to teach a course on Cox model, of which I am not a specialist, to an audience of medical epidemiologists. Not a good idea you might say.. anyway, someone in the audience ...
    Eric ElgueroEric Elguero
    Mar 28, 2007 at 1:39 pm
    Mar 29, 2007 at 12:54 pm
  • Dear list, Does anyone have a suggestion (or better still) code for sampling from the uniform distribution over the convex hull of a set of points? Many thanks and best wishes, Ranjan
    Ranjan MaitraRanjan Maitra
    Mar 24, 2007 at 5:43 am
    Mar 25, 2007 at 11:27 am
  • Greetings to all. I need to concatenate data frames that do not have all the same variable names, there is only a partial overlap in the variables. So, for example, if i have two data frames, a and ...
    Daniel FolkinshteynDaniel Folkinshteyn
    Mar 25, 2007 at 1:47 am
    Mar 25, 2007 at 3:39 am
  • Hi, I'm on my very first steps to R and so I hope that I do not ask a really stupid questions but I did not found it via R-Search, in the FAQ or Google (BTW, the name "R" is not a really good ...
    Andreas TilleAndreas Tille
    Mar 23, 2007 at 9:21 pm
    Mar 25, 2007 at 12:30 am
  • I am looking for a way to produce a "distribution graph" as in the example: ( 03&geotype=STD_HRR&event 1_DIS&eventtype=UTIL Anybody ...
    Plessen, Christian vonPlessen, Christian von
    Mar 23, 2007 at 11:06 am
    Mar 23, 2007 at 7:20 pm
  • Dear useRs, I very much like the effect display of the proportional odds model on page 29 (Figure 8) of the following paper by John Fox ...
    Jan WijffelsJan Wijffels
    Mar 23, 2007 at 11:35 am
    Mar 23, 2007 at 3:57 pm
  • Dear list, I have been using the Rmath library for quite a while: in the current instance, I am calling dnt (non-central t density function) repeatedly for several million. When the argument is ...
    Ranjan MaitraRanjan Maitra
    Mar 21, 2007 at 1:38 pm
    Mar 22, 2007 at 12:53 pm
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688 users for March 2007

Marc Schwartz: 70 posts Gabor Grothendieck: 67 posts Prof Brian Ripley: 52 posts Alberto Vieira Ferreira Monteiro: 46 posts Ted Harding: 37 posts Jim holtman: 36 posts Peter Dalgaard: 33 posts Uwe Ligges: 33 posts Hadley wickham: 29 posts Duncan Murdoch: 28 posts Petr Klasterecky: 26 posts Sergio Della Franca: 23 posts Petr PIKAL: 21 posts Ranjan Maitra: 21 posts Gavin Simpson: 20 posts Michael Kubovy: 20 posts Charilaos Skiadas: 18 posts Chuck Cleland: 18 posts Greg Snow: 18 posts John Kane: 18 posts
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