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842 discussions - 2,880 posts

  • I upgraded to R2.10.1pat and discovered, along with everybody else, that static HTML pages are no longer the default. Fine; my tastes would go the other way, but I'm happy to adapt. However, I'd ...
    Steve RowleySteve Rowley
    Dec 22, 2009 at 8:40 pm
    Jan 9, 2010 at 4:12 pm
  • Dear all, i am new in R. I am writing a review paper about batteries. However, i am interested in analyzing all the papers by keywords, author, references and year. This could be done by "refviz" a ...
    SchwanSchwan
    Dec 11, 2009 at 10:54 am
    Dec 15, 2009 at 9:33 am
  • Dear list, In a little numbers game, I've hit a performance snag and I'm not sure how to code this in C. The game is the following: how many 8-digit numbers have the sum of their digits equal to 17? ...
    Baptiste auguieBaptiste auguie
    Dec 19, 2009 at 2:06 pm
    Jan 13, 2010 at 10:46 am
  • Hi, dear R users I am a newbie in R and I wantto use the method of meximum likelihood to fit a Weibull distribution to my survival data. I use "optim" as follows: optim(c(1, ...
    StevenSteven
    Dec 6, 2009 at 10:53 am
    Dec 8, 2009 at 12:07 pm
  • Hi, I'm a bit new to R and I would like to know how can I compare simple main effects when using the aov function. I'm doing a mixed model ANOVA with two between subjects variables and one within ...
    Or DuekOr Duek
    Dec 19, 2009 at 5:27 pm
    Feb 27, 2010 at 10:10 pm
  • The external grep program has an option -v to select non-matching lines. I'm wondering if how to exclude certain patterns in grep() in R?
    Peng YuPeng Yu
    Dec 4, 2009 at 5:52 pm
    Dec 9, 2009 at 6:19 pm
  • Hello everyone. After some good time of work, I am proud to present: www.r-bloggers.com What is R-Bloggers.com? R-Bloggers.com hopes to serve the R community by presenting (in one place) all the new ...
    Tal GaliliTal Galili
    Dec 5, 2009 at 7:38 pm
    Dec 9, 2009 at 5:16 pm
  • Hi, I have created a web interface to enable analysis for users without having much to worry about the stats in the backend. In this particular case I have reached a stage where I have finally ...
    AmritAmrit
    Dec 1, 2009 at 4:55 am
    Mar 23, 2010 at 9:25 am
  • The following examples are confusing to me. It is OK, to assigned NULL to one element in a list. The result is still a list. However, a list of NULL's are reduced to NULL. I don't understand how this ...
    Peng YuPeng Yu
    Dec 11, 2009 at 4:43 pm
    Dec 11, 2009 at 10:17 pm
  • Hi Julia: I am sure that you will find many useful resources as you attempt to learn R. If time permits, please look at the Tegrity-based video that I?ve prepared for my students ...
    Dr. Thomas W. MacFarlandDr. Thomas W. MacFarland
    Dec 1, 2009 at 6:52 pm
    Dec 19, 2009 at 10:36 am
  • Hi R Users, I'm using following data/code (data is attached also) to produce a stacked barplot. # Sample Data: Names Col1 Col2 Col3 Row1 -20 40 -10 Row2 30 -20 40 Row3 30 10 -20 Row4 20 20 -10 # R ...
    Peng CaiPeng Cai
    Dec 2, 2009 at 6:40 pm
    Dec 5, 2009 at 4:05 am
  • Yet another question... I'm wondering if there is a built in facility to log errors. I've got this statement that gives me verbose DBI errors as they come up (to standard output), but I'd like to ...
    Nick TorenvlietNick Torenvliet
    Dec 29, 2009 at 4:11 am
    Dec 30, 2009 at 6:59 pm
  • Hi to all I need a string like temp <- paste("m1","m2","m3",sep=",") But i must know how many items are in the string,afterwards the other option would be to use a vector temp <- c("m1","m2","m3") No ...
    Knut KruegerKnut Krueger
    Dec 23, 2009 at 10:21 am
    Dec 26, 2009 at 9:53 am
  • Hi, Could you please help me in solving the following error message: Error in `[.data.frame`(mytestdata, fp_temp == 1) : undefined columns selected when I use scan instead on read.table, I reicieve ...
    Nancy AdamNancy Adam
    Dec 15, 2009 at 8:35 pm
    Dec 16, 2009 at 11:58 am
  • I'm facing this problem on R GUI version 2.10.0 on Windows Vista. I have not changed Windows settings or R GUI settings much except to change from MDI to SDI. Someone else reported this problem a few ...
    Viju MosesViju Moses
    Dec 13, 2009 at 3:34 am
    Dec 14, 2009 at 1:57 am
  • Hello all, I have a set of numbers that looks like this: [1] 1 1 2 2 2 3 4 4 4 4 1 2 2 2 3 3 1 1 1 2 3 4 4 4 5 5 Please ignore the bold numbers, I just want to make my problem clear. I am going to ...
    LisaLisa
    Dec 2, 2009 at 8:30 pm
    Dec 4, 2009 at 9:58 am
  • length(unique(c(1,2,2)))==length(c(1,2,2)) I use the above test to test if all the elements in a vector are unique. But I'm wondering if there is a convenient function to do so in R library.
    Peng YuPeng Yu
    Dec 1, 2009 at 3:42 am
    Dec 2, 2009 at 3:24 am
  • Hi useR's, I am resending this request since I got no response for my last post and I am new to the list so pardon me if I am violating the protocol. I am trying to use the "Kernlab" package for ...
    Vishal ThaparVishal Thapar
    Dec 25, 2009 at 4:42 am
    Dec 26, 2009 at 3:39 pm
  • Hi, I seek to identify those points in/outside a multidimensional convex hull (geometry::convhulln). Any suggestions? Background just in case I'm going down a really wrong road: Given an observed ...
    Keith JewellKeith Jewell
    Dec 4, 2009 at 12:15 pm
    Dec 18, 2009 at 3:05 pm
  • Hi, I'm quite new to the R-project. I was suggested to look into it because I am trying to solve the "Subset sum" problem", which basically is: Given a set of integers and an integer s, does any ...
    Geert JanssensGeert Janssens
    Dec 7, 2009 at 2:56 pm
    Dec 11, 2009 at 2:08 pm
  • Hi, I have a data frame and want to merge adjacent rows if some condition is met. There's an obvious solution using a loop but it is prohibitively slow because my data frame is large. Is there an ...
    Titus von der MalsburgTitus von der Malsburg
    Dec 8, 2009 at 12:50 pm
    Dec 9, 2009 at 11:41 pm
  • Hi, When I reply to a post, it generally appears as a separate thread, rather than branching off the original post. Anyone know what I'm doing wrong? Noting I am currently receiving a couple of the ...
    Charlotte MaiaCharlotte Maia
    Dec 2, 2009 at 2:48 am
    Dec 3, 2009 at 8:50 am
  • Hi, I am using R and I want to know how data can be transferred from Excel Spread sheet to R for analyzing. I have done like this mydata<-read.table("C:\Documents and ...
    Sta_2279Sta_2279
    Dec 17, 2009 at 5:24 pm
    Nov 14, 2012 at 9:59 pm
  • Hi, I have a glm gives summary as follows, Estimate Std. Error z value Pr( |z|) (Intercept) -2.03693352 1.449574526 -1.405194 0.159963578 A 0.01093048 0.006446256 1.695633 0.089955471 N 0.41060119 ...
    CasperycCasperyc
    Dec 7, 2009 at 12:05 am
    Mar 8, 2011 at 2:51 pm
  • I'm just learning and this is probably very simple, but I'm stuck. I'm trying to understand the by(). This works. by(TestData, LEAID, summary) But, This doesn't. by(TestData, LEAID, median(RATIO)) ...
    L.A.L.A.
    Dec 9, 2009 at 1:36 am
    Jan 5, 2010 at 10:53 am
  • Hi, I'm new to R, with some experience with Matlab and SPSS. I've figured out how to run my repeated measures anova and am getting the right numbers for my effects (comparing with results from other ...
    Jon PrinceJon Prince
    Dec 22, 2009 at 9:22 pm
    Dec 23, 2009 at 5:05 pm
  • I have the following code, which tests the split on a data.frame and the split on each column (as vector) separately. The runtimes are of 10 time difference. When m and k increase, the difference ...
    Peng YuPeng Yu
    Dec 9, 2009 at 4:28 am
    Dec 18, 2009 at 3:15 pm
  • Hi is there an easy and fast way, to generate a BibTeX file of all installed / loaded packages and R? I know about toBibtex(citation()) to extract the BibTeX for a single package, but how can I ...
    Rainer M KrugRainer M Krug
    Dec 11, 2009 at 7:15 am
    Dec 16, 2009 at 9:37 am
  • Hello everyone, I have come across a bit of an odd problem: I am currently analysing data PCR reaction data of which part is behaving exponential. I would like to fit the exponential part to the ...
    AntoAnto
    Dec 1, 2009 at 2:22 pm
    Dec 8, 2009 at 1:33 pm
  • Dear R experts, Wish you all a HAPPY NEW YEAR! How do I go about plotting (using lattice) overlays of an ID (group=ID) observed, fitted data in each panel of a multiple panel plot (each panel ...
    SantoshSantosh
    Dec 31, 2009 at 11:25 am
    Jan 5, 2010 at 10:40 pm
  • Hi, I have a data frame that was create by issuing a select against my sqlite database. I want to get each row from the data frame and use the each of the column values. The data frame looks like ...
    DonahchooDonahchoo
    Dec 31, 2009 at 7:44 pm
    Jan 1, 2010 at 10:03 pm
  • Both of these applications fulfill a great need of mine: to read data directly from google spreadsheets that are private to myself and one or two collaborators. Thanks to the authors. I had been ...
    Farrel BuchinskyFarrel Buchinsky
    Dec 10, 2009 at 2:47 am
    Dec 29, 2009 at 12:06 am
  • Hi, I have a data.frame containing a Date column. When using write.csv() function to generate a CSV file, I always get the Date column formatted as "YYYY-MM-DD". I would like to have it formatted as ...
    George ZouGeorge Zou
    Dec 28, 2009 at 3:19 pm
    Dec 28, 2009 at 10:52 pm
  • Hi All, This example code ---------------- dDF <- structure(list(y = c(4.75587, 4.8451, 5.04139, 4.85733, 5.20412, 5.92428, 5.69897, 4.78958, 4, 4), t = c(0, 48, 144, 192, 240, 312, 360, 0, 48, 144), ...
    Keith JewellKeith Jewell
    Dec 22, 2009 at 4:02 pm
    Dec 23, 2009 at 1:39 pm
  • Hi, I am trying to create a set of dummy variables to use within a multiple linear regression and am unable to find the codes within the manuals. For example i have: Price Weight Clarity IF VVS1 VVS2 ...
    Whitaker m. (mw1006)Whitaker m. (mw1006)
    Dec 16, 2009 at 2:58 pm
    Dec 16, 2009 at 11:10 pm
  • I'm wondering if lazy copy is available in R or not. For example, in the following code, I'm wondering if the memory for y is allocated in the 2nd line or the 3rd line. Is there a documentation for ...
    Peng YuPeng Yu
    Dec 15, 2009 at 3:03 am
    Dec 16, 2009 at 5:02 am
  • Hello I've created a function to make a plot with multiple pannels from columns of data that are created in a previous function. In the example below the number of columns is 8, giving 4 pannels, but ...
    Jennifer YoungJennifer Young
    Dec 11, 2009 at 3:02 pm
    Dec 14, 2009 at 11:15 pm
  • [1] "1" "3" Apparently, intersect() treats num as string. But this is not documented in the help. Could somebody add it in the future version of R? Also according to the help, the argument should not ...
    Peng YuPeng Yu
    Dec 2, 2009 at 9:33 pm
    Dec 3, 2009 at 8:51 pm
  • Hi R Users, I'm wondering how can I calculate two (or three) way sum of a variable. A sample data is: State Month Year Value NC Jan 1996 1 NC Jan 1996 2 NC Feb 1997 2 NC Feb 1997 3 NC Mar 1998 3 NC ...
    Peng CaiPeng Cai
    Dec 3, 2009 at 6:50 pm
    Dec 3, 2009 at 7:20 pm
  • Hi all, How can I overcome the error "object of type 'closure' not subsettable" I ran the following script seq <- paste(seq(1914, 1916, by=1), "*.y", sep=".") # make sequence c <- 3 # total number of ...
    Muhammad RahizMuhammad Rahiz
    Dec 20, 2009 at 7:40 pm
    May 19, 2010 at 7:47 pm
  • Dear list, I have a couple of questions concerning ridge regression. I am using the lm.ridge(...) function in order to fit a model to my microarray data. Thus *model=lm.ridge(...)* I retrieve some ...
    Eleni ChristodoulouEleni Christodoulou
    Dec 2, 2009 at 3:42 pm
    Jan 8, 2010 at 4:50 pm
  • Hi, I have 49 pairs in my data.frame 'data' x y 76 80 138 143 67 67 29 50 381 464 23 48 37 63 120 115 ... ... how do I get a bootstrap sample of size nP? i have tried sample(data,sizeP,replace=TRUE) ...
    CasperycCasperyc
    Dec 6, 2009 at 9:06 pm
    Jan 6, 2010 at 8:55 pm
  • Dear All, I am not sure how to remove double quotation marks in a string, e.g., paste("variable", 1). Can anybody please help me solve it? Thank you in advance. Lisa -- View this message in context ...
    LisaLisa
    Dec 29, 2009 at 6:16 pm
    Dec 29, 2009 at 9:18 pm
  • Hello again, I am simply trying to import a rectangular table of strings. The table's dimensions are 1990 x 2, yet my read.table() command can only find 362 of the rows (and they're not the first ...
    JonathanJonathan
    Dec 20, 2009 at 4:42 am
    Dec 20, 2009 at 7:06 pm
  • Currently, I load the RData file then ls() and str(). But loading the file takes too long if the file is big. Most of the time, I only interested what the variables are in the the file and the ...
    Peng YuPeng Yu
    Dec 16, 2009 at 9:13 pm
    Dec 19, 2009 at 9:39 am
  • Hi all, I'm a beginner user of R. I am stuck at what I thought was a very obvious problem, but surprisingly, I havent found any solution on the forum or online till now. My problem is simple. I have ...
    Gaurav MogheGaurav Moghe
    Dec 8, 2009 at 8:55 pm
    Dec 8, 2009 at 10:41 pm
  • Aloha all, I love using ggplot. It took a while to get used to the grammar of graphics, but it is starting to get easy now that I am thinking in a more structured way. A question. I'm making a wind ...
    Thomas S. DyeThomas S. Dye
    Dec 4, 2009 at 2:18 am
    Dec 7, 2009 at 6:24 pm
  • Hey Everyone, I'm pretty new at R and wanted to try and make some graphs with dummy data before using it to analyze my own. I successfully made a bar graph and error bars, but I can't figure out how ...
    Bshan101Bshan101
    Dec 3, 2009 at 7:18 am
    Dec 4, 2009 at 6:01 pm
  • Hi, I?m trying to install new package in R (version 2.4.0) under windows vista and i have problems. I always receive the same message: Erro en zip.unpack(pkg, tmpDir) : no fue posible abrir el ...
    Catuxa-2Catuxa-2
    Dec 2, 2009 at 11:55 am
    Dec 2, 2009 at 4:43 pm
  • Dear R users, I am having a minor but annoying issue with R.app. It doesn't retain the history information from the previous sessions. By "history," I mean a record of commands/functions entered into ...
    Maria GouskovaMaria Gouskova
    Dec 9, 2009 at 6:33 pm
    Apr 8, 2012 at 1:53 pm
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David Winsemius: 200 posts Peng Yu: 91 posts Gabor Grothendieck: 67 posts Duncan Murdoch: 57 posts Jim Holtman: 55 posts Uwe Ligges: 45 posts Baptiste auguie: 38 posts Greg Snow: 33 posts Romain Francois: 30 posts Henrique Dallazuanna: 29 posts Jim Lemon: 25 posts Milton ruser: 25 posts Tal Galili: 24 posts William Dunlap: 24 posts Peter Dalgaard: 23 posts Peter Ehlers: 23 posts Sharpie: 23 posts Gray Calhoun: 22 posts Peng Cai: 22 posts Charles C. Berry: 21 posts
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