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492 discussions - 1,444 posts

  • I am fitting models to the responses to a questionnaire that has seven yes/no questions (Item). For each combination of Subject and Item, the variable Response is coded as 0 or 1. I want to include ...
    Daniel Ezra JohnsonDaniel Ezra Johnson
    Dec 31, 2006 at 9:19 am
    Jan 2, 2007 at 2:36 am
  • Dear Rexperts, lately I'm having troubles installing the rgl package via install.packages("rgl", dependencies=T) in the R 2.4.0 backport running under Ubuntu 6.06 LTS. I get the following error ...
    Ivailo StoyanovIvailo Stoyanov
    Dec 15, 2006 at 11:52 am
    Dec 15, 2006 at 3:34 pm
  • I have hundreds of humans who have undergone SNP genotyping at hundreds of loci. Some have even undergone the procedure twice or thrice (kind of an internal control). So obviously I need to find ...
    Farrel BuchinskyFarrel Buchinsky
    Dec 31, 2006 at 7:17 am
    Jan 2, 2007 at 3:15 pm
  • dear R experts: I wonder whether it is possible to extend the summary method for the lm function, so that it uses an option "hccm" (well, model "hc0"). In my line of work, it is pretty much required ...
    Ivo welchIvo welch
    Dec 24, 2006 at 1:46 am
    Dec 26, 2006 at 5:24 pm
  • Dear R-help, I have a loop, which is set to take about 26 hours to run at the rate it's going - this is ridiculous and I really need your help to find a more efficient way of loading up my array ...
    Jenny BarnesJenny Barnes
    Dec 14, 2006 at 12:56 pm
    Dec 14, 2006 at 3:48 pm
  • Dear R-helpers, How come that in the following code the rnorm() function is evaluated only once for each branch of the 'ifelse' ? x <- rnorm(10) y1 <- ifelse(x 0, rnorm(1) , rnorm(1)) What is the ...
    Dec 12, 2006 at 8:13 pm
    Dec 13, 2006 at 1:37 pm
  • Hello All, We would like to call quantile() function from the R-package STATS in a Delphi program. If this is possible, could anyone provide us with an example? Thanks in advance. --Anna ...
    Anna BelovaAnna Belova
    Dec 4, 2006 at 7:27 pm
    Dec 7, 2006 at 4:04 pm
  • Hi all, I have a list with a numerical column "cum_hardreuses". By coincidence I discovered this: Min. 1st Qu. Median Mean 3rd Qu. Max. 1 2 4 36 14 1790 (note the max value of 1790) Ouch this is bad! ...
    Sebastian SpaethSebastian Spaeth
    Dec 4, 2006 at 11:04 am
    Dec 7, 2006 at 2:39 pm
  • Right now, I am using SAS and S+/R. As a new year resolution, I am planning to learn a scripting language. from statisticians' point of view, which scripting language is worth to learn, perl, python, ...
    Wensui LiuWensui Liu
    Dec 23, 2006 at 3:56 pm
    Dec 31, 2006 at 4:19 pm
  • I'd like to develop a simple library in R in which to save my particular functions. I have read the manual on "Writing R Extensions" but it's too difficult. Someone could help me? I want only save my ...
    Michele de meoMichele de meo
    Dec 20, 2006 at 4:51 pm
    Dec 22, 2006 at 10:45 pm
  • Hi, How can we set the environment for the minuslog function in mle()? The call in this code fails because the "ll" function cannot find the object 'y'. Modifying from the example in ?mle ...
    Sebastian P. LuqueSebastian P. Luque
    Dec 30, 2006 at 5:17 am
    Jan 3, 2007 at 4:03 pm
  • Hi Everyone, I am stuck with a simple problem. Suppose I have a vector x, and I want to calculate y[i]=x[i+1]-x[i], it is very easy. I just need to write y<-x[2:length(x)]-x[1:length(x)-1]. Now if I ...
    Geoffrey ZhuGeoffrey Zhu
    Dec 26, 2006 at 3:33 pm
    Dec 27, 2006 at 7:02 pm
  • Greetings all, I am using lmer (lme4 package) to analyze data where the response is a proportion (0 to 1). It appears to work, but I am wondering if the analysis is treating the response ...
    Cameron GilliesCameron Gillies
    Dec 3, 2006 at 6:58 pm
    Dec 4, 2006 at 6:46 am
  • Thank you sir for your prompt reply. Currently i am stuck at point where I need to call an available Matlab program from an R 2.4.0 interface. How can I do this? I have downloaded the R.matlab file ...
    Bhanu Kalyan.KBhanu Kalyan.K
    Dec 15, 2006 at 12:29 pm
    Dec 28, 2006 at 11:08 am
  • This might be an trivial thing but I am stuck. Consider: xx <- list(a=1:5, b=letters[1:5]) Although object xx is accessible through its name, how can object xx$b be accessed similarly through its ...
    Christos HatzisChristos Hatzis
    Dec 24, 2006 at 5:06 am
    Dec 25, 2006 at 10:08 pm
  • An apparatus exists whereby a collection of balls is displaced to the top of a stack by suction. A top level (Level 1) each ball is shifted 1 unit to the left or 1 unit to the right at random with ...
    Ethan JohnsonsEthan Johnsons
    Dec 9, 2006 at 6:39 am
    Dec 11, 2006 at 12:31 am
  • Dear Rexperts, after building R 2.4.0 from source in a temporary directory (*without* installation), and subsequently moving the whole source/build tree to another location, I have noticed that I had ...
    Ivailo StoyanovIvailo Stoyanov
    Dec 7, 2006 at 5:34 pm
    Dec 7, 2006 at 8:11 pm
  • hello R-friends, I am a R beginner and try to ask a basic question: How to test the spatial dependence of a column of data? for example, I have 25 agricultural fields, and I measure the average slope ...
    Xu YuanXu Yuan
    Dec 5, 2006 at 9:34 pm
    Dec 7, 2006 at 2:42 pm
  • Dear all, I've got a problem in fitting multilevel model in lme. I don't know to much about that but suspect that something is wrong with my model. I'm trying to fit ...
    Dec 6, 2006 at 8:33 am
    Dec 7, 2006 at 7:14 am
  • I have a data set like this: if I want to less than 200000 obs from this data set. How can I do these? 'data.frame': 465979 obs. of 6 variables: $ p : Factor w/ 1982 levels "154l_aa","1A0P_aa",..: 1 ...
    Aimin YanAimin Yan
    Dec 8, 2006 at 10:45 pm
    Dec 31, 2006 at 5:27 pm
  • Hi, how to suppress a "loading required package:... " message? Kind regards Jaci --
    Dec 27, 2006 at 4:42 pm
    Dec 28, 2006 at 6:22 am
  • Hi all, I am using the zoo package to plot time series. I have a problem with formatting the axes. my zoo object (z) looks like the following. c1 1992-01-10 21 1992-01-17 34 1992-01-24 33 1992-01-31 ...
    Ahmad ajakhAhmad ajakh
    Dec 27, 2006 at 1:05 am
    Dec 27, 2006 at 7:08 pm
  • Hello, I am trying to call sendmail from within R via system(). As sendmail reads from STDIN, I need to pass a multiline input as an argument. E.g. (not working): system('sendmail -f xxx at swing.be ...
    Nicolas MazziottaNicolas Mazziotta
    Dec 22, 2006 at 7:54 am
    Dec 23, 2006 at 7:26 am
  • Hi all, I'm trying to use symbols() to draw a circle of a given radius at a given position onto a filled.contour() plot. The commands I issue are: As can be seen on the resulting PDF file ...
    Dec 17, 2006 at 12:06 pm
    Dec 18, 2006 at 8:19 am
  • Hi, I'm trying to use expression() to write a text to a graphic in the margin. Using: mtext(expression(beta),side=1,line=2) writes a perfect beta greek character, but I need to add a subindex "max", ...
    Javier garcia-pintadoJavier garcia-pintado
    Dec 12, 2006 at 3:59 pm
    Dec 14, 2006 at 12:28 am
  • I have a data frame that looks like this: url time somethingirrelevant visits www.foo.com 1:00 xxx 100 www.foo.com 1:00 yyy 50 www.foo.com 2:00 xyz 25 www.bar.com 1:00 xxx 200 www.bar.com 1:00 zzz ...
    George NachmanGeorge Nachman
    Dec 12, 2006 at 11:34 pm
    Dec 13, 2006 at 11:56 am
  • Dear R users, I want to install the Rcmdr package in a Quantian linux machine, but, when i tried that, following commands appeared: ** building package indices ... * DONE (Rcmdr) The downloaded ...
    İbrahim Mutlayİbrahim Mutlay
    Dec 9, 2006 at 9:02 pm
    Dec 10, 2006 at 1:11 am
  • Hi all! I have lots of functions called in the following pattern 'NameOfFunctionNumber' where the name always stays the same and the number varies from 1 to 98. Another function which I run in ...
    Katharina VedovelliKatharina Vedovelli
    Dec 8, 2006 at 1:57 pm
    Dec 8, 2006 at 4:34 pm
  • Dear R-community, my data set looks like 'mat' below. Plant<-c(NA,1,1,1,NA,NA,NA,NA,NA,1); Value1<-rnorm(1:10); Value2<-rnorm(1:10); mat<-cbind(Plant,Value1,Value2); I receive data from two different ...
    Hans-Juergen EickelmannHans-Juergen Eickelmann
    Dec 5, 2006 at 3:33 pm
    Dec 6, 2006 at 8:49 am
  • I have the clinical study data. Year 0 Year 3 Retinol (nmol/L) N Mean +-sd Mean +-sd Vitamin A group 73 1.89+-0.36 2.06+-0.53 Trace group 57 1.83+-0.31 1.78+-0.30 where N is the number of male for ...
    Ethan JohnsonsEthan Johnsons
    Dec 3, 2006 at 5:55 am
    Dec 4, 2006 at 2:37 pm
  • Hi. I am using R 2.3.1 on Windows XP. I had installed a library package into my first session and wanted the same package in my second session, so I went out to the CRAN mirror and tried to install ...
    Talbot KatzTalbot Katz
    Dec 29, 2006 at 8:33 pm
    Dec 30, 2006 at 1:29 pm
  • I am working with a dataset where there are 5 possible outcomes (coded 1:5), I would like to create 5 categorical variables (event1...event5). I am using a for loop an if statements, but I have a ...
    Dec 29, 2006 at 6:15 pm
    Dec 29, 2006 at 11:25 pm
  • Dear Sir I would appreciate recieving the manul instruction of the program foe geochemical calculations.please what are the requirmentsof using the program Thanks Tanat university faculty of science ...
    Mohamed ghoneimMohamed ghoneim
    Dec 4, 2006 at 10:28 am
    Dec 29, 2006 at 3:54 pm
  • I am looking for hints on how to estimate ratings for competitors in an ongoing pairwise competition using R... my particular area of interest being the game of Go, but the idea of identifying ...
    Jeff NewmillerJeff Newmiller
    Dec 26, 2006 at 5:54 pm
    Dec 27, 2006 at 7:41 am
  • Hello, Gurus: I tried to test if the sample mean of a dataset is zero. The data has 1500 numbers with a lot of zeros and some small positive numbers. The data range on [0,1] but the distribution is ...
    Dec 19, 2006 at 3:28 pm
    Dec 23, 2006 at 5:07 am
  • Hello, I have a large data set 320.000 rows and 1000 columns. All the data has the values 0,1,2. I wrote a script to remove all the rows with more than 46 missing values. This works perfect on a ...
    Iris KolderIris Kolder
    Dec 18, 2006 at 10:19 am
    Dec 21, 2006 at 5:07 pm
  • Greetings, \Sexpr{} has worked on MikTex with earlier versions of R, I can not seem to get it to work with R-2.4.0. I run Sweave with MikTex using the following statement in Run under Accessories ...
    Blanchard, SuzetteBlanchard, Suzette
    Dec 20, 2006 at 11:26 pm
    Dec 21, 2006 at 4:32 pm
  • Hi! As per Thomas' advice, I upgraded R by using "update.packages()" and got the following warning messages: Warning messages: 1: installation of package 'lmtest' had non-zero exit status in ...
    Dec 19, 2006 at 10:59 pm
    Dec 21, 2006 at 3:10 pm
  • I want to replace some objects in one row or column.For example, One colume: a,b,a,c,b,b,a,a,c. I want to replace "a" with "1", "b" with "2", and "c" with "3". Like this: 1,2,1,3,2,2,1,1,3. How to do ...
    Zhang JianZhang Jian
    Dec 19, 2006 at 8:05 am
    Dec 21, 2006 at 1:42 pm
  • Can anyone help me about pass by reference of arguments in R functions? I have read about .Alias in base package however it is defunct and there is no replacement for it. Thanks in advance.
    Biter bilenBiter bilen
    Dec 20, 2006 at 7:37 am
    Dec 21, 2006 at 10:29 am
  • Dear List, I would greatly appreciate help on the following matter: The RuleFit program of Professor Friedman uses partial dependence plots to explore the effect of an explanatory variable on the ...
    Mark DiffordMark Difford
    Dec 20, 2006 at 10:17 am
    Dec 21, 2006 at 9:53 am
  • Hi all, I have to recode some values in a dataset. for example changing all zeros to "." or 999 would be also ok. does anybody know how to do this? thanks in advance. lars -- View this message in ...
    Dec 18, 2006 at 6:58 pm
    Dec 20, 2006 at 12:31 pm
  • Hello, as I just spent a (too long) while searching for a way how to persistantly switch back the help display routines from chm to text, here a small documentation how to do that with the windows ...
    Fridolin WildFridolin Wild
    Dec 19, 2006 at 11:41 am
    Dec 20, 2006 at 12:26 am
  • Hello R users -- If I have a dataframe such as the following, named "frame" with the columns intended to be named col1 through col6, col1 col2 cmlo3 col4 col5 col6 [1,] 3 10 2 6 5 7 [2,] 6 8 4 10 7 1 ...
    Ben FairbankBen Fairbank
    Dec 14, 2006 at 5:39 pm
    Dec 16, 2006 at 12:49 am
  • This should be simple but I am struggling. I like to easily switch in xyplot between a linear or logarithmic y-axis by setting a logical flag logY to False or True. This switch changes the scales ...
    Dec 15, 2006 at 10:12 pm
    Dec 15, 2006 at 11:43 pm
  • Dear list members, Could anyone tell me if there is an equivalent of the Matlab declaration 'persistant' in R? Thank you very much, Bernard Gregorry. (Matlaber converted to R) ...
    Bernard GregoryBernard Gregory
    Dec 14, 2006 at 6:13 pm
    Dec 15, 2006 at 2:36 pm
  • If I use latex(summary(X)) where X is a data frame with four variables I get something like Rainfall Education Popden Nonwhite Min. :10.00 Min. : 9.00 Min. :1441 Min. : 0.80 1st Qu.:32.75 1st ...
    Dec 14, 2006 at 9:37 pm
    Dec 15, 2006 at 12:14 am
  • Hi, Is it possible to install R in a linux box (Debian) without being a root. I know I can compile the R source code, but there is no F77 compiler on the box. So is it possible to install binary R ...
    Lu kanLu kan
    Dec 13, 2006 at 10:28 am
    Dec 14, 2006 at 11:19 pm
  • Hi I have two datasets, A and B, consisting of two columns of numbers representing x and y coordinates. They have 10 and 6 rows respectively. I want to plot two scattergraphs, one above the other ...
    Robin HankinRobin Hankin
    Dec 14, 2006 at 10:32 am
    Dec 14, 2006 at 8:21 pm
  • I want to set default directory for R when I start R. How to do this? Thanks, Aimin
    Aimin YanAimin Yan
    Dec 10, 2006 at 10:48 am
    Dec 13, 2006 at 4:09 pm
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