Grokbase Groups R r-help May 2008
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802 discussions - 2,512 posts

  • Hi, I am doing a very informal presentation for my office about R capabilities to deal with and analyze spatial data, display data and maps, and connections with GIS. I've used in my presentation ...
    Monica PisicaMonica Pisica
    May 22, 2008 at 4:00 pm
    May 28, 2008 at 11:32 am
  • Hi everyone, I am confused on how to specify some nesting and interaction terma with lme(). I have a dataset where some flies where selected for accessory gland size, made to mate in presence/absence ...
    Federico CalboliFederico Calboli
    May 8, 2008 at 4:32 pm
    May 16, 2008 at 4:28 am
  • Hi R, I have a 100th order equation for which I need to solve the value for x. Is there a package to do this? For example my equation is: (x^100 )- (2*x^99) +(10*x^50)+.............. +(6*x ) = 4000 I ...
    Shubha Vishwanath KaranthShubha Vishwanath Karanth
    May 24, 2008 at 11:16 am
    May 26, 2008 at 7:29 am
  • Readers, Using version 251 I tried the following command: lm(y~a+b,data=datafile) Resulting in, inter alia: ... coefficients (intercept) a 1.2 3.4 Packages installed: acepack ace() and avas() for ...
    E-letterE-letter
    May 15, 2008 at 12:05 pm
    May 16, 2008 at 12:58 pm
  • Greetings R users, maybe there is someone who can help me with this problem: I define a function "optim.fun" and want as output the sum of squared errors between predicted and measured values, as ...
    Fernando MoyanoFernando Moyano
    May 7, 2008 at 3:40 pm
    May 20, 2008 at 10:39 am
  • Hello, I am just about to install R and was wondering about a few things. I have only worked in Matlab because I wanted to do a logistic regression. However Matlab does not do logistic regression ...
    MariaMaria
    May 28, 2008 at 11:01 am
    May 29, 2008 at 2:11 pm
  • Colleagues, I have encountered behavior of random number generation that eludes me. I generate a random integer in a particular range using the following code: sample(1000:9999, size=1) This code ...
    Dennis FisherDennis Fisher
    May 10, 2008 at 5:55 pm
    May 13, 2008 at 5:58 pm
  • I have a matrix of frequency counts from 0-160. x<-as.matrix(c(0,1,0,0,1,0,0,0,1,0,0,0,0,1)) I would like to apply a function creating a new column (x[,2])containing values equal to: a) log(x[m,1]) ...
    T.D.RudolphT.D.Rudolph
    May 27, 2008 at 7:42 pm
    May 30, 2008 at 5:50 am
  • Hi, From R 2.6, I would like to update to R2.7. I would like to have some tips on the recommended method of installing the latest versions of an entire list of packages in R2.7 - i.e. all the ...
    RaviRavi
    May 7, 2008 at 4:51 pm
    May 9, 2008 at 7:11 am
  • Dear R-helpers, I'm having a problem in using plot.design in Design Library. Tho following example code produce the error: Error in value.chk(at, ix, xseq, if (plot.type == "curves") 100 else 40, ...
    Patrizio FredericPatrizio Frederic
    May 29, 2008 at 10:53 am
    May 31, 2008 at 4:15 am
  • scale(X, scaleúLSE) ?scale -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) ...
    Chuck ClelandChuck Cleland
    May 13, 2008 at 2:35 pm
    May 15, 2008 at 8:38 am
  • Dear all, Is there a less cumbersome way to rename a column by name (as opposed to index) than -- names( X)[ names[ X] == "bob"]<-"sue" ? A semi-related question: how does one get the index of a ...
    Chip BarnabyChip Barnaby
    May 5, 2008 at 2:48 pm
    May 5, 2008 at 6:59 pm
  • I am trying to simulate a series of ones and zeros (1 or 0) and I am using "rbinom" but realizing that the number of successes expected is not accurate. Any advice out there. This is the example ...
    Philip Twumasi-AnkrahPhilip Twumasi-Ankrah
    May 28, 2008 at 12:53 pm
    May 29, 2008 at 4:26 pm
  • Dear all, I want to create a list that contains 0,1,2,3, ..., 10000 as its elements. I used the following code, which apparently doesn't work very well. a <- 0 for(i in 1:10000) { a <- list(a, i) } ...
    Daniel YangDaniel Yang
    May 28, 2008 at 2:43 am
    May 28, 2008 at 5:13 pm
  • Dear all, I have several datasets and I want to generate pdf plots from them. I also want to generate automatically the names of the files. They are country-specific and the element ...
    Roland RauRoland Rau
    May 14, 2008 at 4:06 pm
    May 15, 2008 at 11:36 pm
  • Hi, What's one way to convert an integer to a string with preceding 0's? such that '13' becomes '00000000013' to be put into a string I've tried formatC, but they removes all the zeros and replace it ...
    Anh TranAnh Tran
    May 12, 2008 at 9:22 pm
    May 13, 2008 at 9:40 am
  • hie all i am trying to carry out a categorical data analysis but my problem is that when in i use the chi squared test some of my expected values are less than 5. is there a test that can handle this ...
    Raymond chirukaRaymond chiruka
    May 6, 2008 at 4:34 pm
    May 8, 2008 at 3:00 am
  • Hi, Does anyone know of a package in R that has a function to convert network data (e.g. an adjacency matrix or ) from 2-mode to 1-mode? I am conducting social network analysis. I know that Pajek has ...
    Messing, Solomon O.Messing, Solomon O.
    May 9, 2008 at 7:37 pm
    Jun 4, 2009 at 6:28 pm
  • Hello, I have a specific problem, I have a large dataframe, and after clustering I want to select certain colums, the elements of a subcluster. My dataframe looks like this : [1] "101KF4319097339" ...
    SebastianEckSebastianEck
    May 19, 2008 at 9:20 am
    May 20, 2008 at 11:54 am
  • I would like to create a 3d scatterplot that is interactive in the sense that I can spin it on its axes to better visualize some PCA results I have. What are the options in R? I've looked at RGL and ...
    Mark KimpelMark Kimpel
    May 3, 2008 at 12:08 am
    May 19, 2008 at 8:51 pm
  • Dear list: I have two dataframes, say dat1 and dat2. Each has several variables but 3 of each are common in both, (say v1, v2 and v3). v1 and v2 are factores while v3 is numeric. Now, I need a subset ...
    PartofyPartofy
    May 10, 2008 at 10:31 pm
    May 11, 2008 at 4:39 pm
  • Dear R-users, I have the following problem In a lab experiment I have to mix three solutions to get different concentrations of various molecules in a cuvette I've used R to calculate the necessary ...
    Dr. Ottorino-Luca PantaniDr. Ottorino-Luca Pantani
    May 6, 2008 at 4:07 pm
    May 11, 2008 at 9:42 am
  • Dear colleagues, I am new to R and statistics so please keep that in mind. I have doubts on the df calculation of Ljung-Box test (Box.test). The function seems to use always the df=lag=m and not ...
    Nuno PristaNuno Prista
    May 16, 2008 at 3:45 pm
    Aug 11, 2008 at 2:15 pm
  • For example, based on a certain condition, I may want to exit my code early: # Are there the same number of assets in "prices" and "positions"? if (nAssetPositions != nAssetPrices) { cat("Different ...
    Bill CunliffeBill Cunliffe
    May 29, 2008 at 6:23 pm
    May 29, 2008 at 6:48 pm
  • Hi everyone, I run the R loops on window XP and vista. Both are Intel core 2 Duo 2.2 GHz with 2 GB ram and XP is significantly faster than vista. Dose anyone know how speed up R loops in vista? Thank ...
    CtuCtu
    May 28, 2008 at 8:26 am
    May 28, 2008 at 11:05 pm
  • Hi everyone I have been trying to build R in ubuntu 8.04 from its source code but am getting the following error. configure: error: --with-x=yes (default) and X11 headers/libs are not available ...
    Nitesh AgrawalNitesh Agrawal
    May 25, 2008 at 6:12 pm
    May 28, 2008 at 4:18 pm
  • hi all, i wanted to use the sink function to sequentially output regression summaries within a for-loop. i must have something wrong somewhere (or be using the sink function incorrectly), but can ...
    Tony DellTony Dell
    May 1, 2008 at 2:29 am
    May 27, 2008 at 10:12 am
  • Hello, maybe someone can help me. I am looking for a possibility to plot a 3D area diagram like in Excel: http://www.microsoft.com/germany/mac/excel/images/chartbefore.jpg Watch this! Would be nice ...
    AlGatesAlGates
    May 22, 2008 at 7:04 pm
    May 23, 2008 at 6:53 pm
  • Hi all, I tried to follow an online tutorial to run openBUgs but the package BRugs has been removed from R repository. Could someone provide a link for where to download BRugs? Thanks a lot! -- View ...
    QqwQqw
    May 22, 2008 at 7:09 pm
    May 23, 2008 at 6:42 am
  • All, Very basic question I can't seem to find the answer to: plot(0:10, 0:10) The axes intersection is not aligned at (0,0) in the lower left. How does one force this? I searched for graphical ...
    David AfshartousDavid Afshartous
    May 20, 2008 at 3:49 pm
    May 20, 2008 at 7:37 pm
  • # I'm new to R and am trying to get the hang of how it handles # dataframes & loops. If anyone can help me with some simple tasks, # I'd be much obliged. # First, i'd like to generate some random ...
    Donald BramanDonald Braman
    May 19, 2008 at 7:41 pm
    May 20, 2008 at 12:34 am
  • Hello I'm using the xfig-function in R to export figures in fig-format. To use these exported figures in LaTeX, I first run a fig2dev to get a pstex and pstex_t file. However, in order to get the ...
    RobertRobert
    May 15, 2008 at 10:12 am
    May 19, 2008 at 2:20 pm
  • Dear list, I have a text file from a scanner that includes 20 lines of text (scanner settings) before it actually starts showing the readings in a tabular format (headings are ID, intensity, ...
    DAVID ARTETA GARCIADAVID ARTETA GARCIA
    May 16, 2008 at 2:30 pm
    May 18, 2008 at 12:58 pm
  • Dear R-help - I have thought about this question for a bit, and come up with no satisfactory answer. Say I have the numeric vector t1, given as t1 <- c(1.0, 1.5, 2.0, 2.5, 3.0) I simply want to ...
    Erik IversonErik Iverson
    May 16, 2008 at 2:56 pm
    May 16, 2008 at 8:03 pm
  • Hi, I am trying to split a string into 2 separate strings in 2 lines. So, tried with sprintf("%s \n %s", "ID", "Name") But R prints: [1] "ID \n Name" instead of ID Name Is it something I am missing ...
    A EzhilA Ezhil
    May 14, 2008 at 3:37 pm
    May 15, 2008 at 8:54 am
  • Dear R-help I'm working on a large dataset which I have divided into 20 subsets based on similar features. Each subset consists of observations from different locations and I wish to use the location ...
    Jorunn SlagstadJorunn Slagstad
    May 9, 2008 at 12:04 pm
    May 14, 2008 at 1:05 pm
  • Hi All, I've just rebuild the latest R with the Goto BLAS on our new Intel quad core machines. I did a few basic matrix calculations, and I was very impressed by the performance I saw. I wonder if ...
    Baker D.J.Baker D.J.
    May 13, 2008 at 11:33 am
    May 14, 2008 at 11:10 am
  • Hello, When making a graph, plot and boxplot automatically sort my factor levels (y axis) into alphabetical order. Is there a way to make it NOT do this? I've tried: sort.by="none", sortedúLSE, ...
    Lydia N. SlobodianLydia N. Slobodian
    May 1, 2008 at 1:31 pm
    May 12, 2008 at 4:54 pm
  • Hi All, I am trying to make R package using R 2.6.2 And I am getting following error. When I give R CMD check t1\ ---------- Making package t1 ------------ adding build stamp to DESCRIPTION making ...
    Vidhu ChoudharyVidhu Choudhary
    May 1, 2008 at 8:20 pm
    May 10, 2008 at 9:01 pm
  • I have a data with 236 observations. After plotting the histogram, I found that it looks like non-central t distribution. I would like to get MLE for mu and df. I found an example to find MLE for ...
    KateKate
    May 8, 2008 at 2:34 pm
    May 9, 2008 at 2:32 pm
  • Hi, The unique function is easy to understand and use. Beyond that, I want to get also the frequency of repetition of each individual row in a data frame Let me explain with an example ...
    RaviRavi
    May 7, 2008 at 4:11 pm
    May 8, 2008 at 6:37 pm
  • I was trying to plot some data in R. I used the following code to draw a loess fit and got the output as Error in lowess(log(abs(t(res))), log(abs(t(synthesised)))) :?? NA/NaN/Inf in foreign function ...
    ShetumiShetumi
    May 30, 2008 at 2:32 pm
    Jul 18, 2008 at 2:59 am
  • Has anyone come across any alternatives to rJava and JRI? Are they any good? Better perhaps? Please give your reasons. Thanks, Danish - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ...
    Munir, DanishMunir, Danish
    May 22, 2008 at 7:50 pm
    Jun 12, 2008 at 10:09 pm
  • Hi all Four questions regarding Unicode. Three Windows questions. I am using - a PC with Windows XP (Build 20600.xpsp080413-2111 (Service Pack 3); - the following R version: platform i386-pc-mingw32 ...
    Stefan Th. GriesStefan Th. Gries
    May 30, 2008 at 3:14 pm
    Jun 1, 2008 at 7:50 pm
  • hi, my linear model is y=c+a*x1+b*x2 i tried to found a, c, b by the use of: mymodel<-lm(y~1+x1+x2) where y, x1, x2 are 3 vectors with the same length the result is a=NA.so i want to know where is ...
    HanenHanen
    May 29, 2008 at 9:15 pm
    May 30, 2008 at 4:14 am
  • Hi, Is there an R function or package that computes p-value? -GV
    Edward WijayaEdward Wijaya
    May 28, 2008 at 10:23 am
    May 29, 2008 at 6:57 am
  • Dear all, I am currently creating a package and writing the documention files for some functions (the main functions). When using R CMD check myPackage, I get a warning message indicating that some ...
    Ardia DavidArdia David
    May 27, 2008 at 1:30 pm
    May 28, 2008 at 11:39 am
  • Dear R users, I would like to call R from C++ and Rcpp class library already compiled are a big advantage !! I have already read the doc/PDF in the installed package 5.0 and all the posts in this ...
    Roberto IacopettiRoberto Iacopetti
    May 26, 2008 at 2:08 pm
    May 27, 2008 at 3:29 pm
  • Hi there, assume that you have data with different sampling like d1 <- rnorm(100) d2 <- rnorm(150) now, I'd like to create two boxplots in one graph but each plot located at the sampling number at ...
    AntjeAntje
    May 23, 2008 at 3:52 pm
    May 26, 2008 at 9:27 am
  • Hi all, I don't know if this is the proper place to ask this, but I am trying to configure emacs/ess on Ubuntu 8.04 to run the way described for ESS and Xemacs in Windows (John Fox's guide). I ...
    Wade WallWade Wall
    May 25, 2008 at 2:07 pm
    May 25, 2008 at 4:09 pm
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