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565 discussions - 1,900 posts

  • Hello, In the latest 'Scientific Computing World' magazine (issue 78, p. 22), there is a review on free statistical software by Felix Grant ("doesn't have to pay good money to obtain good statistics ...
    Philippe GrosjeanPhilippe Grosjean
    Nov 17, 2004 at 9:53 am
    Nov 24, 2004 at 9:21 am
  • Hi there, When I ran the wilcox.exact test, it always shows "number of items to replace is not a multiple of replacement length" However, according to the help it seems to be able to handle sample of ...
    Fang laiFang lai
    Nov 3, 2004 at 7:04 pm
    Nov 30, 2004 at 9:09 pm
  • Hi, I want to draw a scatter plot with 1M and more points and save it as pdf. This makes the pdf file large. So i tried to save the file first as png and than convert it to pdf. This looks OK if ...
    Witold Eryk WolskiWitold Eryk Wolski
    Nov 24, 2004 at 3:34 pm
    Nov 25, 2004 at 6:02 pm
  • I have vector X of length N that I want to have a running sum for (called Y). I just need max(Y). I do this with a "for" loop like so: Y <- vector(length=N) Y[1] <- X[1] for (i in 2:N) { Y[i] <- ...
    Sean DavisSean Davis
    Nov 19, 2004 at 6:08 pm
    Nov 20, 2004 at 5:20 pm
  • Will R run under Windows Pocket PC? Yours Lars Strand
    Lars StrandLars Strand
    Nov 9, 2004 at 11:59 am
    Nov 10, 2004 at 11:55 pm
  • Hi all there Can some one clarify me on this issue, features wise which is better R or SAS, leaving the commerical aspect associated with it. I suppose there are few people who have worked on both R ...
    Neela vNeela v
    Nov 20, 2004 at 8:18 am
    Nov 24, 2004 at 6:57 pm
  • what package should I include to use timeDate? I want to convert a double (num of millis) into date object.
    Yasser El-ZeinYasser El-Zein
    Nov 22, 2004 at 5:45 pm
    Nov 24, 2004 at 12:49 pm
  • Hi all I'm trying to use the function glm from the MASS package to do the following fit. fit <- glm(FP ~ rand, data = tab, family = poisson(link = "identity"), subset = rand = 1) (FP is = 0) but I ...
    Federico GherardiniFederico Gherardini
    Nov 25, 2004 at 1:00 pm
    Nov 30, 2004 at 2:53 am
  • Hello, I have the following very simple problem: Say I have two vectors, a<-c(1,7,4,5,9,11) b<-c(7,4,9) I would like to create a vector containing the elements in a which are not in b. Obviously, ...
    Alexander SokolAlexander Sokol
    Nov 11, 2004 at 1:33 pm
    Nov 11, 2004 at 2:31 pm
  • Hi Folks, I'm sure I'm speaking for more than a few (though possibly a minority) here. There's something of a hidden assumption that R users can readily download whatever they need from CRAN. Some of ...
    Ted HardingTed Harding
    Nov 16, 2004 at 9:39 pm
    Nov 17, 2004 at 9:12 pm
  • Hi, We are planning to buy a 64-bit Linux machine which will mainly run R. There was an interesting thread on 64-bits on r-help back in April that basically confirmed that the 64-bit R is fine as ...
    Vadim OgranovichVadim Ogranovich
    Nov 12, 2004 at 9:06 pm
    Nov 15, 2004 at 7:56 pm
  • Hello R-users, When I didn't know about the internal 'choose' function, I made such function, 'my.choose' below. But when I used them instead of choose(6000,20), they didn't give me any answer. What ...
    Nov 8, 2004 at 11:58 am
    Nov 8, 2004 at 11:16 pm
  • Hello All, I'd like to read first words in lines into a new file. If I have a data file the following, how can I get the first words: apple, banana, strawberry? i1-apple 10$ New_York i2-banana 5$ ...
    J leeJ lee
    Nov 1, 2004 at 6:25 pm
    Nov 4, 2004 at 1:49 pm
  • Dear R experts, I am posting this question on behalf of a Japanese R user who wants to know how to change the siginificant codes default. As you know, R's default significant codes are: Signif ...
    Shigeru MaseShigeru Mase
    Nov 20, 2004 at 5:12 pm
    Nov 22, 2004 at 10:13 am
  • I'm doing some analyses of historical data from France in 1830 on 'moral statistics' that I'd like to show on a map. I've done most of my analyses in SAS, but a few things would work better in R. To ...
    Michael FriendlyMichael Friendly
    Nov 18, 2004 at 9:29 pm
    Nov 21, 2004 at 10:53 pm
  • Hi all! Did I miss something or is it just a temporary problem? Where has the Debian respository http://cran.r-project.org woody/main Packages resp. http://cran.r-project.org/bin/linux/debian/ gone? ...
    Christoph BierChristoph Bier
    Nov 14, 2004 at 9:53 pm
    Nov 19, 2004 at 10:04 am
  • Hi! I'm trying to do the following. I have monthly a dataset with, among other things, "marketcap", and "return". I want to multiply return by the marketcap of the previous month. How do I do this? ...
    Tobias MuhlhoferTobias Muhlhofer
    Nov 30, 2004 at 8:45 pm
    Dec 1, 2004 at 2:11 pm
  • How can I get a single backslash in a character string? My goal is to escape dots in a string that will be used as a regular expression. I thought I could do it this way: gsub(".", "\\.", x) ...
    Dan LipsittDan Lipsitt
    Nov 29, 2004 at 5:20 pm
    Nov 29, 2004 at 8:47 pm
  • Dear All, I have the following data coming out from s <- with(final, summarize(norm, llist(gtt,fdiab), function(norm) { n <- sum(!is.na(norm)) s <- sum(norm, na.rm=T) binconf(s, n) }, type='matrix') ...
    Jean-Louis AbitbolJean-Louis Abitbol
    Nov 24, 2004 at 6:24 pm
    Nov 25, 2004 at 7:31 am
  • suppose I want to insert 5 into the vector (1,2,3,4,6) between 4 and 6. thx!
    Jing tangJing tang
    Nov 22, 2004 at 2:43 pm
    Nov 23, 2004 at 8:04 am
  • Say you have a vector named x and a function which returns the character string "x" . How would I take "x" as an input and return the vector x? DISCLAIMER: This e-mail message and any attachments are ...
    Apoian, ZackApoian, Zack
    Nov 17, 2004 at 3:48 pm
    Nov 17, 2004 at 5:32 pm
  • This has been asked before, but all the answers are hidiously complex. The legend.text=TRUE option of barplot is almost exactly what I need, except I need a legend.placement='tl' (top left) option ...
    Dan BolserDan Bolser
    Nov 3, 2004 at 3:55 pm
    Nov 5, 2004 at 12:27 am
  • Dear r-help list members, Is there a way to test whether an object is an S4 object? The best that I've been able to come up with is isS4object <- function(object) !(is.null(slotNames(object))) which ...
    John FoxJohn Fox
    Nov 26, 2004 at 3:28 am
    Dec 5, 2004 at 4:37 am
  • Golly, anyone who read Plato's Dialogues would realize that the Socratic method involves patiently leading the questioner stepwise through the solution, not simply writing RTFMeno. Jim
    Jim LemonJim Lemon
    Nov 30, 2004 at 6:24 pm
    Nov 30, 2004 at 7:38 pm
  • Dear R-listers, It seems that predict() behaves differently within panel.xyplot. Am I doing something stupid? Thanks, Carlisle First, without xyplot(): Call: lm(formula = s ~ t, data = subset(P100, ...
    Carlisle ThackerCarlisle Thacker
    Nov 30, 2004 at 4:09 pm
    Nov 30, 2004 at 4:59 pm
  • Hello, I am using code like the following to create as simple plot... plot(x,y,type='b') lines(lowess(x,y),lwd=3,lty=3,col=2) I want to add a legend which shows lines looking exactly like those used ...
    Dan BolserDan Bolser
    Nov 25, 2004 at 2:01 pm
    Nov 28, 2004 at 7:46 pm
  • Hello: Will someone PLEASE help me with this problem. This is the third time I've posted it. When I appply anova() to two equations estimated using glmmPQL, I get a complaint, Error in anova.lme(fm1, ...
    Andrew CriswellAndrew Criswell
    Nov 26, 2004 at 2:31 am
    Nov 27, 2004 at 2:22 pm
  • Dear R-users, I have a basic question about how to determine the antilog of a variable. Say I have some number, x, which is a factor of 2 such that x = 2^y. I want to figure out what y is, i.e. I am ...
    Heather J. BrantonHeather J. Branton
    Nov 24, 2004 at 5:26 pm
    Nov 25, 2004 at 4:22 am
  • Hi there, I tried to add a few circles on an existing figure using the following codes grid.circle(x=0.5, y=0.5, r=0.1, draw=TRUE, gp=gpar(col=5)) grid.circle(x=0.5, y=0.5, r=0.3, draw=TRUE, ...
    Jin LiJin Li
    Nov 22, 2004 at 2:07 am
    Nov 24, 2004 at 12:06 am
  • Dear R users, Please can you help me with a relatively straightforward problem that I am struggling with? I am simply trying to plot a baseline survivor and hazard function for a simple data set of ...
    Eric LimEric Lim
    Nov 23, 2004 at 6:56 am
    Nov 23, 2004 at 11:27 pm
  • I have written a function to plot data which will be used for various different chemistries. A simplified version is: plot_data <- function(risk,levels,chem,sd2,measure){ plot(risk, levels,main=paste ...
    Emily BaldockEmily Baldock
    Nov 11, 2004 at 4:31 pm
    Nov 13, 2004 at 9:24 pm
  • r-help: I have an R package suggestion. After spending several hours the other day installing about a dozen packages, I had an idea. In xemacs, there is a "sumo" package which allows me to install a ...
    Rodney SparapaniRodney Sparapani
    Nov 11, 2004 at 7:57 pm
    Nov 12, 2004 at 2:22 pm
  • The RPM for Fedora Core 2 seems to work just fine on Core 3. (The graphics window got smaller, but I'm sure there is a setting for that.) Jon -- Jonathan Baron, Professor of Psychology, University of ...
    Jonathan BaronJonathan Baron
    Nov 9, 2004 at 5:44 pm
    Nov 11, 2004 at 2:16 pm
  • Hi, How can I specify a Cox proportional hazards model with a covariate which i believe its strength on survival changes/diminishes with time? The value of the covariate was only recorded once at the ...
    Array chipArray chip
    Nov 2, 2004 at 11:41 pm
    Nov 8, 2004 at 3:28 pm
  • Hello, I need to use "R" to determine parameters which are integers. How I can do this, please ? Ludo
    Ludovic TambourLudovic Tambour
    Nov 2, 2004 at 10:17 am
    Nov 2, 2004 at 6:22 pm
  • Hi, I have a dataframe (say myData) and want to get a list (say myList) that contains a matrix for each row of the dataframe myData. These matrices are calculated based on the corresponding row of ...
    Arne HenningsenArne Henningsen
    Nov 1, 2004 at 6:37 pm
    Nov 2, 2004 at 4:25 pm
  • Hello! A problem with special characters seemed to me to be a bug. I sent a mail to R-windows at r-project.org concerning the problem (see below). How can I find out, if this is considered as a bug ...
    Heinz TuechlerHeinz Tuechler
    Nov 30, 2004 at 12:24 pm
    Dec 1, 2004 at 9:53 am
  • I've just upgraded to 2.0.1 and was taken by surprise by the changes in graphical parameter handling for lattice plots. I'd previously been using 1.9.1. The old settings seem to have been replaced by ...
    Nov 30, 2004 at 4:39 am
    Nov 30, 2004 at 11:30 pm
  • Hello! I would like to know how do I citate R? I have used it during my Master thesis but I don’t know how to citate during the text and on the references. I’ve looked for it on the web page but only ...
    Tatiana FernandesTatiana Fernandes
    Nov 29, 2004 at 4:19 pm
    Nov 29, 2004 at 4:33 pm
  • Dear all, in last weeks you discussed about R vs SAS. I want to ask your opinion about a comparison between R and SPSS. I don't know this software, but some weeks ago I went to a presentation of this ...
    Vito RicciVito Ricci
    Nov 25, 2004 at 12:15 pm
    Nov 26, 2004 at 10:15 pm
  • Dear all, not really a R question but: If I want to check for the classification accuracy of a LDA with previous PCA for dimensionality reduction by means of the LOOCV method: Is it ok to do the PCA ...
    Christoph LehmannChristoph Lehmann
    Nov 24, 2004 at 10:16 am
    Nov 26, 2004 at 10:38 am
  • Dear All, In the last few days I started using the last version of R as I encountered a problem with R1.9 and the use of RWinEdt, however the problem shows with R2.01 as well. More precisely 1. I ...
    Giovanna jona lasinioGiovanna jona lasinio
    Nov 22, 2004 at 11:43 am
    Nov 23, 2004 at 11:10 am
  • hi all, I am trying to use named list to hash a bunch of vector by name, for instance: test = list() test$name = c(1,2,3) the problem is that when i try to get the values back by using the name, the ...
    Ulas karaozUlas karaoz
    Nov 18, 2004 at 4:29 pm
    Nov 18, 2004 at 7:07 pm
  • Dear R list: I modelled changes in a variable (mconc) over time (d) for individuals (replicate) given one of three treatments (treatment) using: mconc.lme <- lme(mconc~treatment*poly(d,2), ...
    Dan BebberDan Bebber
    Nov 17, 2004 at 2:35 pm
    Nov 18, 2004 at 9:52 am
  • Dear All, I have been struggling to understand why for the housing data in MASS library R and stata give coef. estimates that are really different. I also tried to come up with many many examples ...
    Jean EidJean Eid
    Nov 11, 2004 at 12:46 am
    Nov 11, 2004 at 6:52 pm
  • I've ported somebody else's rather cumbersome Matlab model to R for colleagues that want a free build of the model with the same type of I/O. The Matlab model reads a text file with the initial ...
    Andy BunnAndy Bunn
    Nov 11, 2004 at 3:57 pm
    Nov 11, 2004 at 6:08 pm
  • Dear List, I need to add a subscript and a superscript to some of the ions in the labels on some plots. I have got to here but now I'm stuck: plot(1:10, xlab = expression(paste("nm SO"[4], " ", mu, ...
    Gavin SimpsonGavin Simpson
    Nov 4, 2004 at 12:20 pm
    Nov 4, 2004 at 3:24 pm
  • I am trying to use some ms access databases in R (version 1.9.1 or 2.0 on a Debian system). In searching the net for promising software to do this, I found mdbtools. Mdbtools claims the ability to ...
    Anne YorkAnne York
    Nov 1, 2004 at 7:14 pm
    Nov 1, 2004 at 10:11 pm
  • I have a data set of about 10000 records which was compiled from several smaller data sets using SPSS. During compilation 88 false records were accidentally introduced which comprise all NA values. I ...
    Robert Brown FM CEFASRobert Brown FM CEFAS
    Nov 1, 2004 at 3:17 pm
    Nov 1, 2004 at 5:09 pm
  • Hi ! I am wondering how to plot data (e.g. f(x,y) ) in a coordinate system spanned by two non-orthogonal basis vectors (e.g. hexagonal symmetry). The data is given on an equally spaced grid in theses ...
    Andreas FrankeAndreas Franke
    Nov 29, 2004 at 1:29 pm
    Dec 1, 2004 at 1:14 pm
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Prof Brian Ripley: 159 posts Peter Dalgaard: 72 posts Uwe Ligges: 71 posts Liaw, Andy: 56 posts Gabor Grothendieck: 47 posts Thomas Lumley: 45 posts Ted Harding: 36 posts Marc Schwartz: 30 posts Duncan Murdoch: 29 posts Spencer Graves: 29 posts John Fox: 27 posts Deepayan Sarkar: 26 posts Andy Bunn: 23 posts Martin Maechler: 23 posts Dimitris Rizopoulos: 22 posts Vito Ricci: 22 posts Frank E Harrell Jr: 21 posts Adaikalavan Ramasamy: 20 posts Douglas Bates: 20 posts Sundar Dorai-Raj: 18 posts
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