Grokbase Groups R r-help May 2009
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936 discussions - 3,013 posts

  • Dear R users, Can anyone please tell me how to generate a large number of samples in R, given certain distribution and size. For example, if I want to generate 1000 samples of size n=100, with a ...
    Debbie ZhangDebbie Zhang
    May 13, 2009 at 3:13 pm
    May 18, 2009 at 2:10 pm
  • Is R an appropriate tool for data manipulation and data reshaping and data organizing? I think so but someone who recently joined our group thinks not. The new recruit believes that python or another ...
    Farrel BuchinskyFarrel Buchinsky
    May 6, 2009 at 4:22 am
    May 13, 2009 at 8:46 am
  • Hi, Is there any way to sort a tabel with a colum with IP-address? table: id rank color status ip 138 29746 yellow no 162.131.58.26 138 29746 red yes 162.131.58.16 138 29746 blue yes 162.131.58.10 ...
    edwin Sendjajaedwin Sendjaja
    May 29, 2009 at 4:51 am
    Jun 19, 2009 at 4:40 pm
  • Hi! I'm new to R programming, though I've been programming in other languages for years. One thing I find most frustrating about R is how difficult it is to use Google (or any other search tool) to ...
    Kynn JonesKynn Jones
    May 20, 2009 at 1:02 pm
    May 22, 2009 at 2:16 am
  • There are six assignments in total. It won't take you long if you were familiar with R. For those who are interested, please send me an email with your profile (your experience with R, how long and ...
    Ayaku1993Ayaku1993
    May 8, 2009 at 4:19 am
    May 10, 2009 at 8:45 pm
  • Could you help me with a problem? I should put non-linear variables into zelig-model, how can that be done? I'm dealing with air pollution data, trying to find out daily associations between ...
    Jaana KettunenJaana Kettunen
    May 9, 2009 at 9:39 am
    May 19, 2009 at 9:26 pm
  • Hi, I would like to have lineplot.CI and barplot.CI to actually plot confidence intervals , instead of standard error. I understand I have to use the ci.fun option, but I'm not quite sure how. Like ...
    Jarle BjørgeengenJarle Bjørgeengen
    May 22, 2009 at 4:38 pm
    May 26, 2009 at 1:34 pm
  • Hi, I was wondering how to specify the number of decimal numbers in my computation using R? I have too many decimal numbers for my result, when I convert them to string with as.character, the string ...
    LeheLehe
    May 14, 2009 at 11:40 am
    May 14, 2009 at 4:32 pm
  • Hi all, I saw a thread from 2007 about the possible implementation of a PGF (http://sourceforge.net/projects/pgf/) graphics device. Does anyone know if something came of it? I would very much like if ...
    Lasse BombienLasse Bombien
    May 6, 2009 at 1:37 pm
    May 8, 2009 at 6:46 am
  • Dear R Users, I have 12 data frames, each of 12 rows and 2 columns. e.g. FeketeJAN MEAN SUM_ AMAZON 144.4997874 68348.4 NILE 5.4701955 1394.9 CONGO 71.3670036 21196.0 MISSISSIPPI 18.9273250 6511.0 ...
    Steve MurraySteve Murray
    May 18, 2009 at 11:17 am
    May 18, 2009 at 1:38 pm
  • Hello! I have a function: zywnoscCalosc<- function( jedzenie, n1, n2, n3, n4, d1, d2, d3, d4 ) { ndf <- data.frame(nn1=n1,nn2=n2,nn3=n3,nn4=n4) ddf <- data.frame(dd1=d1,dd2=d2,dd3=d3,dd4=d4) for (i ...
    GrześGrześ
    May 31, 2009 at 9:43 pm
    Jun 2, 2009 at 10:49 pm
  • Hi everybody, I have a vector of characters and i would like to extract certain parts. My vector is named metr_list: [1] "F:/Naval_Live_Oaks/2005/data//BE.tif" [2] ...
    Monica PisicaMonica Pisica
    May 26, 2009 at 1:27 pm
    May 28, 2009 at 1:23 pm
  • Hi everybody. I want to identify not only duplicate number but also the original number that has been duplicated. Example: x=c(1,2,3,4,4,5,6,7,8,9) y=duplicated(x) rbind(x,y) gives: [,1] [,2] [,3] ...
    Christiaan pauwChristiaan pauw
    May 14, 2009 at 6:16 am
    May 14, 2009 at 10:51 pm
  • I'm trying to prepare some cross tabs, looking at a number of variables against a variable "connector" which has 2 values: "OD Passenger" and " Connector". When I produce a xtabs one way I have ...
    Farley, RobertFarley, Robert
    May 26, 2009 at 8:22 pm
    Jun 3, 2009 at 2:19 am
  • Sometimes I get confused with R's documentation. It seems the documents is not maintained and updated well. Anyone has similar feeling? I don't mean to offend anyone. I hope R would get better and ...
    Zheng, Xin (NIH) [C]Zheng, Xin (NIH) [C]
    May 29, 2009 at 3:01 pm
    May 30, 2009 at 2:25 pm
  • Hi, R experts: I am trying to generate data output in the following format: rom_array := ( "00000000000000000000000000000000", "00000000010010010110111111101100", "00000000100100101101000001011111", ...
    Peng chenPeng chen
    May 26, 2009 at 4:30 am
    May 27, 2009 at 1:35 am
  • What is the recommended class for time of day (independent of calendar date)? And what is the recommended way to get the time of day from a POSIXct object? (Not a string representation, but a ...
    Stavros MacrakisStavros Macrakis
    May 20, 2009 at 2:57 pm
    May 22, 2009 at 6:12 pm
  • I need to perform some calculations with some extremely small numbers (i.e. likelihood values on the order of 1.0E-16,000). Even when using the double() function, R is rounding these values to zero ...
    Joaks1Joaks1
    May 8, 2009 at 8:54 pm
    May 13, 2009 at 2:53 am
  • For years I have been using options(error = recover) either in .Rprofile or from within R for debugging purposes. The functionality of this appears to have changed and I can't recover it (no pun ...
    Mark KimpelMark Kimpel
    May 30, 2009 at 3:45 am
    Jun 1, 2009 at 5:39 am
  • Sounds simple but haven't been able to find it in docs: is it possible to sort a vector using a user-defined comparison function? Seems it must be, but "sort" doesn't seem to provide that option, nor ...
    Steve JaffeSteve Jaffe
    May 28, 2009 at 9:34 pm
    May 29, 2009 at 7:36 am
  • How do I get removed from this mailing list?
    Andrey LyalkoAndrey Lyalko
    May 28, 2009 at 12:25 am
    May 28, 2009 at 12:01 pm
  • Hi, I am trying to parse XML files and read them into R as a data frame, but have been unable to find examples which I could apply successfully. I'm afraid I don't know much about XML, which makes ...
    Brigid MooneyBrigid Mooney
    May 20, 2009 at 8:42 pm
    May 24, 2009 at 4:42 pm
  • Dear users, a very simple question: Given two vectors x and y x<-as.character(c("A","B","C","D","E","F")) y<-as.factor(c("1","2","3","4","5","6")) i want to combine them into a single vector z as A1, ...
    Henning WildhagenHenning Wildhagen
    May 18, 2009 at 11:09 am
    May 18, 2009 at 12:54 pm
  • Hi there, I have a question concerning the behaviour of the colouring with levelplot. (I hope, I manage to explain) If I give the parameters "at" and "col.regions" like this: at <- c(1,2,3,4,5,6) ...
    AntjeAntje
    May 4, 2009 at 11:35 am
    May 7, 2009 at 7:22 pm
  • How do you get the design matrix R used when calculating ANOVA? -- View this message in context: http://www.nabble.com/how-to-get-design-matrix--tp23464638p23464638.html Sent from the R help mailing ...
    LinakplLinakpl
    May 9, 2009 at 9:02 pm
    Sep 2, 2010 at 9:24 pm
  • Hello Apologies if this is a simple question, I have searched the help and have not managed to work out a solution. Does anybody know an efficient method for reading many text files of the same ...
    SYKES, JenniferSYKES, Jennifer
    May 13, 2009 at 10:45 am
    Jan 26, 2010 at 5:51 am
  • Hello I need to plot 3 graphs in a single column; the top two plots have the same title, and I would like it to be written only once, centered horizontally and spanning the two plots. Something like ...
    Andre NathanAndre Nathan
    May 27, 2009 at 7:39 pm
    Jun 2, 2009 at 4:54 pm
  • Dear All, I am observing a strange behavior and searching the archives and help pages didn't help much. I have a csv with a variable number of fields in each line. I use dataPoints <- ...
    Martin TomkoMartin Tomko
    May 29, 2009 at 7:15 pm
    May 31, 2009 at 8:47 pm
  • Given an arbitrary data frame, it is easy to exclude a column given its index: df[,-2]. How to do the same thing given the column name? A naive attempt df[,-"name"] did not work :)
    Zeljko VrbaZeljko Vrba
    May 27, 2009 at 10:37 am
    May 27, 2009 at 4:28 pm
  • Dear guRus: I am using lmer for a mixed model that includes a random intercept for a set of effects that have the same distribution, Normal(0, sig2b). This set of effects is of variable size, so I am ...
    Leigh Ann StarcevichLeigh Ann Starcevich
    May 21, 2009 at 10:16 pm
    May 25, 2009 at 6:22 pm
  • Hello, I want to use seq with multiple from values and am getting unexpected (to me) behavior. I'm wondering if this behavior is intentional or not. [1] 3 6 9 12 Now if I want the combined sequence, ...
    Rowe, Brian Lee Yung (Portfolio Analytics)Rowe, Brian Lee Yung (Portfolio Analytics)
    May 21, 2009 at 7:08 pm
    May 22, 2009 at 3:58 pm
  • I would like to apply a function 'f' to the lagged version of a vector and the vector itself. This is easy to do explicitly: mapply( f, v[-1], v[-length(v)] ) or in the case of a pointwise vector ...
    Stavros MacrakisStavros Macrakis
    May 18, 2009 at 8:24 pm
    May 19, 2009 at 12:38 pm
  • Dear colleagues, Saving a plot with pdf gives a very nice result: pdf("myplot.pdf") par(font=1,family='serif') plot(pressure) dev.off() Doing the very same with other formats (png, jpeg, tiff) gives ...
    Stats WolfStats Wolf
    May 14, 2009 at 4:47 am
    May 16, 2009 at 12:08 am
  • Dear R-help, Suppose I write a script that looks something like this: #### script.R set.seed(something) x <- rnorm(100) y <- runif(500) # bunch of other stuff save.image() ### end of script.R Now, I ...
    G. Jay KernsG. Jay Kerns
    May 14, 2009 at 7:36 pm
    May 15, 2009 at 7:07 pm
  • Hey, what is the R function for the mathematical limit ? e.g. to calculate and return the amount that the expression X^2 +X +2 approach as X approach 2 (X- 2) thanks hassan
    Hassan MohamedHassan Mohamed
    May 5, 2009 at 9:39 am
    May 13, 2009 at 4:30 pm
  • Quick question: Which function do you use to calculate partial derivatives from a model equation? I've looked at deriv(), but think it gives derivatives, not partial derivatives. Of course my ...
    Paul Heinrich DietrichPaul Heinrich Dietrich
    May 10, 2009 at 2:05 pm
    May 12, 2009 at 11:23 am
  • Given a dataframe like ID Type N 1 45900 A 1 2 45900 B 2 3 45900 C 3 4 45900 D 4 5 45900 E 5 6 45900 F 6 7 45900 I 7 8 49270 A 1 9 49270 B 2 10 49270 E 3 18 46550 A 1 19 46550 B 2 20 46550 C 3 21 ...
    Max WebberMax Webber
    May 6, 2009 at 10:09 pm
    May 9, 2009 at 1:11 am
  • Ein eingebundener Text mit undefiniertem Zeichensatz wurde abgetrennt. Name: nicht verf?gbar URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20090507/07227313/attachment.pl
    Peter-Heinz FoxPeter-Heinz Fox
    May 7, 2009 at 1:37 pm
    May 7, 2009 at 5:34 pm
  • Hi all, I am looking to create a pie chart from a given column in a .csv file. My class variables are as follows: entry_type, uniquekey, types, title, url, abstract, journal, author, month, year, ...
    DonkeyRhubarbDonkeyRhubarb
    May 5, 2009 at 1:02 pm
    May 7, 2009 at 10:50 am
  • Hi, Does tapply change the order when applied on a factor? Below is the code I tried. [1] IN0020020155 IN0019800021 IN0020020064 IN0020020155 IN0019800021 IN0019800021 IN0020020064 IN0020020064 ...
    Chirantan KunduChirantan Kundu
    May 6, 2009 at 1:45 pm
    May 6, 2009 at 3:05 pm
  • Hello, We use drc to fit dose-response curves, recently we discovered that there are quite different standard error values returned for the same dataset depending on the drc-version / R-version that ...
    Hans VermeirenHans Vermeiren
    May 20, 2009 at 4:20 pm
    Sep 14, 2011 at 12:33 pm
  • Hi all, I try to assess the parameters (K1,K2) of a model that describes the adsorption of a molecule onto on adsorbent. equation: dq/dt = K1*C*(qm-q)-K2*q I know the value of 'qm' and I ...
    Benoit BoulinguiezBenoit Boulinguiez
    May 13, 2009 at 3:42 pm
    Jun 12, 2009 at 10:34 am
  • Hello Im am working with a biological data including variables called Habitat and Site, example: Habitat Site Forest Low Forest Low Forest High Forest High I want to tell R that the Site variable is ...
    DanielWCDanielWC
    May 29, 2009 at 12:50 pm
    Jun 3, 2009 at 2:53 pm
  • Hi All, I am trying to learn Neural Networks. I found that R has packages which can help build Neural Nets - the popular one being AMORE package. Is there any book / resource available which guides ...
    Indrajit SenguptaIndrajit Sengupta
    May 27, 2009 at 8:13 am
    Jun 2, 2009 at 10:45 am
  • hi I've used R for many years on windows machines, but have now acquired an Asus eee 1000 linux machine. In order to get the best out of the machine, I used the 'pimpmyeee.sh' script, to get the full ...
    Robert KinleyRobert Kinley
    May 26, 2009 at 10:02 am
    Jun 1, 2009 at 9:33 am
  • I have a vector like this: h <- c(4, 6, NA, 12) and I create the secound logical vector like this: g <- c(TRUE, TRUE, FALSE, TRUE) And my problem is that I would like to get a new "m" vector as a ...
    GrześGrześ
    May 29, 2009 at 6:51 pm
    May 30, 2009 at 7:52 pm
  • I am looking for a package to perform harmonic analysis with the goal of estimating the period of the dominant high frequency component in some mono-channel signals. I guess there are presumably a ...
    MauedeMauede
    May 27, 2009 at 4:43 am
    May 28, 2009 at 4:00 am
  • I use the following function to export some figures to .eps: p.eps <- function(p, fname, title = NULL, width, height) { postscript(file=fname, onefileúLSE, paper="special", width=width, ...
    Zeljko VrbaZeljko Vrba
    May 21, 2009 at 10:23 am
    May 22, 2009 at 1:33 pm
  • Dear R users, I am a beginner to R. I generated 1000 samples with 15 data in each sample I tried finding the variance for each sample I used the code: m00;n xÚta[,i] v=var(x)} what I got was just ...
    Chloe SmithChloe Smith
    May 21, 2009 at 12:16 am
    May 21, 2009 at 6:32 am
  • Dear All I am trying to do a repeated measures analysis using lmer and have a number of issues. I have non-orthogonal, unbalanced data. Count data was obtained over 10 months for three treatments, ...
    Christine GriffithsChristine Griffiths
    May 18, 2009 at 11:26 am
    May 19, 2009 at 9:56 pm
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