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635 discussions - 1,908 posts

  • Albr Dear all, Albr I was reading with great interest your comments about the use of R in Albr the industry. Personally, I use R as scripting language in the financial Albr industry, not so much for ...
    Martin MaechlerMartin Maechler
    Feb 8, 2007 at 3:53 pm
    Feb 9, 2007 at 5:15 pm
  • I'm running R 2.4.1 (with the latest versions of all packages) on an FC6 32-bit system. When I try to install the rgl package, compilation fails: --- Please select a CRAN mirror for use in this ...
    Rick BilonickRick Bilonick
    Feb 19, 2007 at 7:35 pm
    Feb 21, 2007 at 9:02 pm
  • The other day, CNN had a story on working at Google. Out of curiosity, I went to the Google employment web site (I'm not looking, but just curious). In perusing their job posts for statisticians, ...
    Doran, HaroldDoran, Harold
    Feb 6, 2007 at 7:08 pm
    Feb 12, 2007 at 12:03 pm
  • I am interested in making a random sample from a uniform distribution of points over the surface of the earth, using the WGS84 ellipsoid as a model for the earth. I know how to do this for a sphere, ...
    Russell SeniorRussell Senior
    Feb 21, 2007 at 8:51 am
    Mar 2, 2007 at 6:19 pm
  • What do you prefer/recommend for double-banger function names: 1 scale.colour 2 scale_colour 3 scaleColour 1 is more R-like, but conflicts with S3. 2 is a modern version of number 1, but not many ...
    Hadley wickhamHadley wickham
    Feb 25, 2007 at 2:44 pm
    Mar 2, 2007 at 3:01 pm
  • That's an interesting function. I initially was tempted to respond that you have managed to reinvent a specialized form of the ifelse function but then I decided to do the timings just to check ...
    Douglas BatesDouglas Bates
    Feb 8, 2007 at 11:00 pm
    Feb 9, 2007 at 10:13 pm
  • Hi, I was wondering if there is a direct approach for lining up 2-column matrices according to the values of the first column. An example and a brute-force approach is given below: x <- cbind(1:10, ...
    Christos HatzisChristos Hatzis
    Feb 1, 2007 at 8:05 pm
    Feb 2, 2007 at 5:35 am
  • Hi all, I was trying to set up an interface for using C functions in R. For this, my R file hello2.r is: --------------------------------------------------------------------------------- hello2 <- ...
    Tim SmithTim Smith
    Feb 8, 2007 at 8:59 pm
    Feb 9, 2007 at 5:15 am
  • I'm interested in doing multinomial logistic regression with equality constraints on some of the parameter values. For example, with categorical outcomes Y_1 (baseline), Y_2, and Y_3, and covariates ...
    Roger LevyRoger Levy
    Feb 2, 2007 at 7:18 pm
    Feb 13, 2007 at 5:40 pm
  • This is probably a simple problem but I don't see a solution. I have a data.frame with a number of columns where I would like 0 <- NA thus I have df1[,144:157] <- NA if df1[, 144: 157] ==0 and df1[, ...
    John KaneJohn Kane
    Feb 7, 2007 at 10:08 pm
    Feb 12, 2007 at 11:09 am
  • Hi all, I have a large file (1.8 GB) with 900,000 lines that I would like to read. Each line is a string characters. Specifically I would like to randomly select 3000 lines. For smaller files, what ...
    Juli g. pausasJuli g. pausas
    Feb 2, 2007 at 5:40 pm
    Feb 4, 2007 at 2:27 pm
  • Hi, Fitting all possible models (GLM) with 10 predictors will result in loads of (2^10 - 1) models. I want to do that in order to get the importance of variables (having an unbalanced variable ...
    Indermaur LukasIndermaur Lukas
    Feb 27, 2007 at 7:46 am
    Mar 16, 2007 at 2:09 pm
  • I am trying to read a number of XML files using xmlTreeParse(). Unfortunately, some of them are malformed in a way that makes R crash. The problem is that closing tags are sometimes repeated like ...
    Ulrich KellerUlrich Keller
    Feb 24, 2007 at 11:47 am
    Feb 24, 2007 at 6:48 pm
  • Hi, I am trying to plot two distribution graph on one plot. But I dont know how. I set them to the same x, y limit, even same x, y labels. Code: x1=rnorm(25, mean=0, sd=1) y1=dnorm(x1, mean=0, sd=1) ...
    Yun ZhangYun Zhang
    Feb 23, 2007 at 2:43 pm
    Feb 24, 2007 at 12:59 pm
  • Hello, we need to convert a logical vector to a (decimal) integer. Example: a=c(TRUE, FALSE, TRUE) (binary number 101) the function we are looking for should return dec2bin(a)=5 Is there a package ...
    Martin FeldkircherMartin Feldkircher
    Feb 15, 2007 at 3:38 pm
    Feb 18, 2007 at 1:14 am
  • Hi R, Please solve my problem........... I am extracting Bloomberg data from R, in a loop. R is getting fatigued by doing this process and gives some errors. I introduced sleep function. Doing this ...
    Shubha Vishwanath KaranthShubha Vishwanath Karanth
    Feb 13, 2007 at 1:17 pm
    Feb 14, 2007 at 5:19 am
  • Dear all, I'm performing RDA on plant presence/absence data, constrained by geographical locations. I'd like to constrain the RDA by the "extended matrix of geographical coordinates" -ie the matrix ...
    MORLONMORLON
    Feb 27, 2007 at 12:14 am
    Mar 1, 2007 at 9:55 am
  • Hi all, Is there an R function to generate random integers? Thanks in advance. Sincerely Anup --------------------------------- Now that's room service! Choose from over 150,000 hotels
    Anup NandialathAnup Nandialath
    Feb 25, 2007 at 6:51 am
    Feb 25, 2007 at 6:35 pm
  • Hi R-users, A newbie question: assume that I have for example 30 columns in my data.frame named DF. When I print DF in R console I get columns that don't fit on the same row underneath each other. So ...
    Lauri NikkinenLauri Nikkinen
    Feb 8, 2007 at 6:01 pm
    Feb 9, 2007 at 1:49 pm
  • Hello all, I'm looking for a way to be able to read a text file into R. It's a csv file but when I do "txt <-read.table("F00.csv", header=T, sep=",")" It doesn't read the file properly, and I only ...
    H. Paul BentonH. Paul Benton
    Feb 17, 2007 at 12:26 am
    Mar 3, 2007 at 12:08 am
  • Dear Group, I am looking for a package that is going to help me on Data preprocessing methods in Datamining. Is there any package in R2.4.0 to support DM? or what is the suitable package that i can ...
    J.joshua thomasJ.joshua thomas
    Feb 28, 2007 at 1:22 am
    Feb 28, 2007 at 2:40 am
  • Hi, Since "R" is a (very) generic name, I've been having some trouble searching the web for this topic. Due to this, I've just created a Google Custom Search Engine that includes several of the most ...
    Sérgio NunesSérgio Nunes
    Feb 23, 2007 at 2:53 pm
    Feb 24, 2007 at 10:12 am
  • Hello, i have a problem with creating histograms and plots under ubuntu linux. After creating a vector "test" i want to make a histogram, but the following error appears: Error in X11() : could not ...
    PreuthPreuth
    Feb 16, 2007 at 8:53 pm
    Feb 19, 2007 at 9:45 am
  • Could smb please help with try-catch encapsulating a function for downloading. Let's say I have a character vector of symbols and want to download each one and surround by try and catch to be safe # ...
    Stephen BondStephen Bond
    Feb 12, 2007 at 9:43 pm
    Feb 15, 2007 at 10:27 pm
  • I am interested in Neural network models in R. Is there any reference material/tutorial which i can use. Regards, TV dinner still cooling? Check out "Tonight's Picks" on Yahoo! TV.
    Vinod gulluVinod gullu
    Feb 12, 2007 at 5:55 pm
    Feb 14, 2007 at 1:50 pm
  • I would like to merge two parts of words to get a name of the data. First M3$N (invariable) and second is a number from 0001 to 3003 - M3$N0001,M3$N0002,...,M3$N3003. For example if I do it like ...
    Robert McFaddenRobert McFadden
    Feb 11, 2007 at 8:39 pm
    Feb 12, 2007 at 2:39 am
  • Greetings, everyone. I've been trying to analyze bird nest survival data using generalized linear mixed models (because we documented several consecutive nesting attempts by the same individuals ...
    Jessi BrownJessi Brown
    Feb 10, 2007 at 7:45 pm
    Feb 11, 2007 at 10:38 pm
  • In Henric's recent post, he included this output: @BOOK{R:Harrell:2001, AUTHOR = {Frank E. Harrell}, TITLE = {Regression Modeling Strategies, with Applications to Linear Models, Survival Analysis and ...
    Zembower, KevinZembower, Kevin
    Feb 8, 2007 at 4:07 pm
    Feb 8, 2007 at 9:22 pm
  • Hi to all, I'm sorry for posting this question, I am sure I am missing something important but after reading the documentation I cannot find where the problem is. I want to add a legend to a figure ...
    Emili Tortosa-AusinaEmili Tortosa-Ausina
    Feb 28, 2007 at 4:06 pm
    Mar 1, 2007 at 1:34 pm
  • Hi, I want to do a chi square test and I have two tab delimited text files with Expected and Observed values to compare. Each file contains only the values and are 48 rows by 116 columns. I have ...
    Carina BrehonyCarina Brehony
    Feb 26, 2007 at 10:06 am
    Feb 26, 2007 at 2:24 pm
  • Hello, I want to select in a column of a dataframe all numbers smaller than a value x but when I type in test<-(RSF_EU$AREA<=x) I receiv as answer: [1] TRUE FALSE FALSE TRUE TRUE TRUE FALSE FALSE ...
    Thomas PreuthThomas Preuth
    Feb 23, 2007 at 1:38 pm
    Feb 23, 2007 at 5:57 pm
  • Hello all, I use R on both windows and a "mainframe" linux installation (RedHat enterprise 3.0, which they tell me is soon to be upgraded to 4.0). On windows I installed the package gplots without ...
    Randy ZelickRandy Zelick
    Feb 20, 2007 at 6:17 pm
    Feb 21, 2007 at 8:52 pm
  • Dear all, I would like to use the Levenberg-Marquardt algorithm for non-linear least-squares regression using function nls.lm. Can anybody help me to find a a way to compute confidence intervals on ...
    Michael DondrupMichael Dondrup
    Feb 21, 2007 at 10:56 am
    Feb 21, 2007 at 6:20 pm
  • Hi All, I would like to ask the following. I have an array of data in an objetct, let's say X. I need to use a for loop on the elements of one or more columns of X and I am having a debate with a ...
    Federico CalboliFederico Calboli
    Feb 19, 2007 at 6:08 pm
    Feb 20, 2007 at 5:36 pm
  • If I run an analysis which generates statistical tests on many SNPs I would naturally want to get more details on the most significant SNPs. Directly from within R one can get the information by ...
    Farrel BuchinskyFarrel Buchinsky
    Feb 5, 2007 at 12:20 am
    Feb 20, 2007 at 1:21 am
  • Hi, I have some big calculations in R to be done. Since I can use R on a server with ssh, i was wondering if I can reopen a R Shell after exiting ssh. I don't want to use the batch mode and nohup ...
    Nils HöllerNils Höller
    Feb 19, 2007 at 1:56 pm
    Feb 19, 2007 at 4:15 pm
  • Dear all, Can anyone please shed some light onto how to do this? This will give me all "intensity" columsn in my data frame: intensityindeces <- grep("^Intensity",names(dataframe),value=TRUE) This ...
    Johannes GraumannJohannes Graumann
    Feb 19, 2007 at 10:43 am
    Feb 19, 2007 at 1:37 pm
  • Hi, I have several files with data in this format: 20070102 20070102 20070106 20070201 ... The data is sorted and each line represents a date (YYYYMMDD). I would like to analyze this data using R ...
    Sérgio NunesSérgio Nunes
    Feb 15, 2007 at 10:23 am
    Feb 16, 2007 at 3:11 pm
  • Any advice, tips, clues or pointers to resources on how best to speed up or, better still, avoid the loops in the following example code much appreciated. My actual dataset has several tens of ...
    Tim ChurchesTim Churches
    Feb 15, 2007 at 1:24 am
    Feb 15, 2007 at 3:19 pm
  • Hi I have table1 which has the foll. columns id age rate and table2 which has the foll. columns id count I wish to get data from table1 for all the ids which are persent in table2 and where the rate ...
    Lalitha viswanathLalitha viswanath
    Feb 6, 2007 at 3:15 pm
    Feb 13, 2007 at 7:49 am
  • Hi, I have an integer which is extracted from a dataframe, which is sorted by another column of the dataframe. Now I would like to remove some elements of the integer, which are near to others by ...
    Bart JoosenBart Joosen
    Feb 10, 2007 at 7:43 am
    Feb 11, 2007 at 3:38 pm
  • Dear All, I am looking for an R function or any other reference to generate a series of correlated Binomial (not a Bernoulli) data. The "bindata" library can do this for the binary not the binomial ...
    Marc BernardMarc Bernard
    Feb 7, 2007 at 1:20 pm
    Feb 9, 2007 at 6:33 pm
  • Sorry to ask such a simple question, but I can't find the answer after extensive searching the docs and the web. How do you remove a component from a list? For example say you have: lst<-c(5,6,7,8,9) ...
    Jason HornJason Horn
    Feb 8, 2007 at 5:30 pm
    Feb 8, 2007 at 7:22 pm
  • Hi! I'm having trouble with importing spss files containing non-ascii characters (R 2.4.1, debian linux, i386). To reproduce: Download the following file ...
    Thomas FriedrichsmeierThomas Friedrichsmeier
    Feb 1, 2007 at 12:52 pm
    Feb 5, 2007 at 4:45 pm
  • I recently downloaded R for Windows, running on Win XP. I'm trying to create a perspective plot but not having any luck after reading the R manual and several examples found on the Internet. I have a ...
    Tom H.Tom H.
    Feb 5, 2007 at 1:50 pm
    Feb 5, 2007 at 2:46 pm
  • gReetings: Is there any way to download a (or a sample of a) crossection of stock market prices? Or is it possible to use get.hist.quote with a *wild card*? Thanks, mihai Mihai Nica 170 East Griffith ...
    Mihai NicaMihai Nica
    Feb 4, 2007 at 2:24 pm
    Feb 5, 2007 at 2:20 pm
  • Hi, I am trying to read in my Affymetrix CEL files (48 files, total ~600 MB) but I keep getting memory errors. Can somebody please help me with this. Or is therea remote server I can send my data to ...
    Tristan CoramTristan Coram
    Feb 1, 2007 at 10:46 pm
    Feb 2, 2007 at 1:20 pm
  • Dear members, I have started to work with R recently and there is one thing which I could not solve so far. I don't know how to define macros in R. The problem at hand is the following: I want R to ...
    Monika KerekesMonika Kerekes
    Feb 25, 2007 at 4:02 pm
    Feb 27, 2007 at 9:36 pm
  • Dear all, i am stuck with a syntax problem. i have a matrix which has about 500 rows and 6 columns. now i want to kick some data out. i want create a new matrix which is basically the old one except ...
    Bunny , lautloscrew.comBunny , lautloscrew.com
    Feb 27, 2007 at 6:25 pm
    Feb 27, 2007 at 8:59 pm
  • Using R version 2.4.1 (2006-12-18) on Windows, I have a dataset which resembles this: id att1 att2 att3 1 1 1 0 2 1 0 0 3 0 1 1 4 1 1 1 ratings <- data.frame(id = c(1,2,3,4), att1 = c(1,1,0,1), att2 ...
    Michael WexlerMichael Wexler
    Feb 22, 2007 at 3:29 pm
    Feb 27, 2007 at 1:33 pm
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Prof Brian Ripley: 75 posts Marc Schwartz: 46 posts Gabor Grothendieck: 42 posts Duncan Murdoch: 41 posts Jim holtman: 31 posts John Kane: 25 posts Peter Dalgaard: 24 posts Douglas Bates: 21 posts Charilaos Skiadas: 20 posts Petr Pikal: 19 posts Roger Bivand: 18 posts Ranjan Maitra: 17 posts Wensui Liu: 17 posts Alberto Vieira Ferreira Monteiro: 16 posts Chuck Cleland: 16 posts Frank E Harrell Jr: 16 posts Greg Snow: 16 posts Johannes Graumann: 16 posts Dimitris Rizopoulos: 15 posts Michael Kubovy: 15 posts
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