Grokbase Groups R r-help March 2010
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1,130 discussions - 3,833 posts

  • Hi R-fans, I would like put out a question to all R users on this list and hope it will create some feedback and discussion. 1) What are your 3 most useful R package? and 2) What R package do you ...
    Ralf BRalf B
    Mar 2, 2010 at 8:13 pm
    Mar 25, 2010 at 1:43 am
  • Hi, Consider something like (modified from "?stat_density"). I'd like to add on the line y=0 a dot for the median of each "decade" category (using the same colour coding as the "fill"). I'm failing ...
    Johannes GraumannJohannes Graumann
    Mar 31, 2010 at 11:46 am
    Apr 12, 2010 at 4:37 pm
  • My interpretation of the relation between 1-way ANOVA and Wilcoxon's test (wilcox.test() in R) is the following. 1-way ANOVA is to test if two or multiple distributions are the same, assuming all the ...
    Blue skyBlue sky
    Mar 5, 2010 at 1:19 pm
    Mar 5, 2010 at 9:26 pm
  • Dear R-ers, I have a large data frame (several thousands of rows and about 2.5 thousand columns). One variable ("group") is a grouping variable with over 30 levels. And I have a lot of NAs. For each ...
    Dimitri LiakhovitskiDimitri Liakhovitski
    Mar 30, 2010 at 3:04 pm
    Apr 8, 2010 at 9:35 pm
  • Dear R users, I have two data frames that were read from text files as follows: x_data <- read.table("x.txt", header = TRUE, sep = "|", quote = "\"'", dec = ".",as.is = TRUE,na.strings = ...
    Newbie19_02Newbie19_02
    Mar 12, 2010 at 4:56 pm
    Mar 12, 2010 at 7:51 pm
  • Why does R need the concept of "Vector"? In my opinion, it is a useless and confusing concept. A vector is simply a special case of a matrix whose row or column number is equal to 1. When I take ...
    YehengxinYehengxin
    Mar 29, 2010 at 11:13 pm
    Apr 27, 2010 at 8:13 am
  • Hello all, Iam newbie here and to R too.Is it possible to customize R to be used to people who has limited knowledge of statistics to perform simple data analysis?.Which language to use?. Any ...
    Twaha MlwiloTwaha Mlwilo
    Mar 1, 2010 at 6:00 am
    Mar 31, 2010 at 2:26 pm
  • Hello, I have a date value in excel: 1/4/2010 which in number format gives me 40182. When I read this with read.xls from R I get same 40182 so what I do is that I use the as.Date() function but here ...
    AnnaAnna
    Mar 25, 2010 at 8:33 pm
    Mar 29, 2010 at 3:52 pm
  • Hi All, I tried to install the package of Rgraphviz in the following two ways successfully: source("http://bioconductor.org/biocLite.R") biocLite("Rgraphviz") ...
    HU,ZHENGJUNHU,ZHENGJUN
    Mar 30, 2010 at 2:44 pm
    Mar 30, 2010 at 10:06 pm
  • Hello Everyone, I have just started learning R and am in the process of figuring out what it can and can't do. I must say I am very impressed with R so far and am amazed that something this good can ...
    Paul MillerPaul Miller
    Mar 17, 2010 at 2:51 pm
    Mar 19, 2010 at 5:07 am
  • Hi I have a question, as im not able to import a csv file which contains a big dataset(100.000 records) someone knows how many records R can handle without giving problems? What im facing when i try ...
    N VialmaN Vialma
    Mar 27, 2010 at 9:19 am
    Mar 30, 2010 at 5:04 pm
  • Dear volunteer: I am a graduate student of medcine in china.And now,I am devoting myself to constructing a nomograms of bladder cancer.I want to do it with R-project.However, I do not know how to ...
    笑啸笑啸
    Mar 25, 2010 at 1:54 pm
    Mar 26, 2010 at 9:19 am
  • How can I generate a vector of differences between each elemtn of an vector? i.e. a[i]=x[i]/x[i-1] -- View this message in context: http://n4.nabble.com/Deltas-or-changes-tp1585960p1585960.html Sent ...
    ManInMoonManInMoon
    Mar 9, 2010 at 1:37 pm
    Mar 10, 2010 at 11:22 pm
  • Hello, I believe the aov() function in R uses a "Type-I sum-of-squares" by default as against "Type-III". This is relevant for me because I am trying to understand ANOVA in R using my knowledge of ...
    Ravi KulkarniRavi Kulkarni
    Mar 1, 2010 at 3:13 pm
    Apr 20, 2010 at 12:06 am
  • Dear R-ers, In my question there are no statistics involved - it's all about data manipulation in R. I am trying to write a code that should replace what's currently being done in SAS and SPSS. Or, ...
    Dimitri LiakhovitskiDimitri Liakhovitski
    Mar 26, 2010 at 9:05 pm
    Mar 30, 2010 at 1:32 pm
  • I'm searching for answers to four questions (I've been searching the net for hours...) In Windows XP, is it possible to call R functions from a c program? (I've found examples for Linux/Unix but not ...
    dkStevensdkStevens
    Mar 27, 2010 at 2:53 pm
    Mar 27, 2010 at 7:05 pm
  • Hi All, I'm trying to find out a way to plot multi-panel pie charts. It may not be the best way to present data, but I would still need one. 1. Is anyone aware of some in-built script/function which ...
    GurmeetGurmeet
    Mar 24, 2010 at 7:00 pm
    Mar 25, 2010 at 7:53 pm
  • For an application in image processing -- using R for statistical purposes -- I need to solve the following task: Given n (e.g. n = 100 or 200) points in the unit square, more or less randomly ...
    Hans W BorchersHans W Borchers
    Mar 21, 2010 at 11:12 am
    Mar 23, 2010 at 3:40 am
  • I have writtn a function where I pass a variable number of arguments. I They are vectors and I can manipulate them, but I need to get hold of the name for a legend. niceplot<-function(...) { ...
    ManInMoonManInMoon
    Mar 10, 2010 at 10:21 pm
    Mar 11, 2010 at 8:15 pm
  • Hello everyone, I have versions 2.7.2 and 2.10.1 installed on a machine that has no access to internet. In 2.7.2 I can use ? to get help on functions, which in 2.10.1 that does not work, all I see is ...
    Sergey GoriatchevSergey Goriatchev
    Mar 11, 2010 at 8:42 am
    Mar 11, 2010 at 3:11 pm
  • Here is the test code. foo<-function(x) exp(-x) for (i in 1:5) { foo<-function(x) foo(x)*x foo(2) } The error is "evalution nested too deeply". I tried Recall() but it didn't work either. Thanks a ...
    SeekerSeeker
    Mar 4, 2010 at 7:08 pm
    Mar 9, 2010 at 6:15 pm
  • Dear R users, I am trying to read a huge file in R. For some reason, only a part of the file is read. When I further investigated, I found that in one of my non-numeric columns, there is one odd ...
    Jonas garciaJonas garcia
    Mar 3, 2010 at 7:22 pm
    Mar 5, 2010 at 7:02 pm
  • Hello! I am wondering at what point does R consider a numeric value to be equal to zero - for statements of the type x==0 and x %in% 0. Thank you very much! -- Dimitri Liakhovitski Ninah.com ...
    Dimitri LiakhovitskiDimitri Liakhovitski
    Mar 25, 2010 at 9:29 pm
    May 2, 2010 at 9:44 pm
  • [,1] [,2] [1,] "A" "1" [2,] "A" "2" [3,] "A" "3" [4,] "B" "1" [5,] "B" "2" [6,] "B" "3" [7,] "B" "4" [8,] "C" "1" [9,] "C" "2" [10,] "C" "3" and I would like to turn it into a list that looks like ...
    AnnaAnna
    Mar 26, 2010 at 6:58 pm
    Apr 19, 2010 at 2:06 pm
  • Hi, I would expect the following: paste( as.character( cat( rep( ".", 2 ) ) ), "a string", as.character( cat( rep( ".", 3 ) ) ) ); to yield this string: ". . a string . . .", but instead it yields ...
    Jeff BrownJeff Brown
    Mar 25, 2010 at 6:53 pm
    Apr 6, 2010 at 6:03 pm
  • I am using nls to fit a non linear function to some data. The non linear function is: y= 1- exp(-(k0+k1*p1+ .... + kn*pn)) I have chosen algorithm "port", with lower boundary is 0 for all of the ki ...
    CorradoCorrado
    Mar 30, 2010 at 11:03 am
    Mar 31, 2010 at 4:39 pm
  • I can take the results of a simulation with one random variable and generate an empirical interval that contains 95% of the observations, e.g., x <- rnorm(10000) quantile(x,probs=c(0.025,0.975)) Is ...
    Tom La BoneTom La Bone
    Mar 28, 2010 at 11:09 pm
    Mar 29, 2010 at 6:15 pm
  • Is anyone using rpad? Is there any documentation or examples beyond that in the 'man' directory of the source? -- View this message in context: http://n4.nabble.com/rpad-tp1679534p1679534.html Sent ...
    SjaffeSjaffe
    Mar 23, 2010 at 7:00 pm
    Mar 24, 2010 at 10:20 pm
  • Hi, there´s something that really bothers me about R and after hours and hours of internet research, I´m still stuck with the same problem: I installed R and it is in Spanish, as the system on my ...
    Katharina GerstendorfKatharina Gerstendorf
    Mar 18, 2010 at 10:16 am
    Mar 19, 2010 at 8:13 am
  • Dear R users, I have to fit the non linear regression: y~1-exp(-(k0+k1*p1+k2*p2+ .... +kn*pn)) where ki =0 for each i in [1 .... n] and pi are on R+. I am using, at the moment, nls, but I would ...
    CorradoCorrado
    Mar 16, 2010 at 6:58 pm
    Mar 18, 2010 at 4:54 pm
  • Hi, I'm looking to move from Windows into a 64-bit Linux environment. Which is the best Linux Flavor to use within R? To install R on this environment, do I need to do any compiling? Thanks all! Axel.
    Axel UrbizAxel Urbiz
    Mar 14, 2010 at 10:04 pm
    Mar 18, 2010 at 6:13 am
  • I often find myself making lists similar to this list(var1=var1, var2=var2) It doesn't seem list has an option, to make it use the name of the variable as name in the list. Is there another function ...
    Rune Schjellerup PhilosofRune Schjellerup Philosof
    Mar 12, 2010 at 9:28 am
    Mar 12, 2010 at 1:21 pm
  • Dear all, I have a time series of daily measurements that starts like this: KWhourly[1:10,] Date Time Value 01/01/13 00:00:00 1.6 01/01/13 01:00:00 1.6 01/01/13 02:00:00 1.6 01/01/13 03:00:00 1.6 ...
    Christina KaramperidouChristina Karamperidou
    Mar 30, 2010 at 7:32 pm
    Mar 31, 2010 at 1:13 am
  • Dear friends, I am testing glm as at page 514/515 of THE R BOOK by M.Crawley, that is on proportion data. I use glm(y~x1+,family=binomial) y is a proportion in (0,1), and x is a real number. I get ...
    CorradoCorrado
    Mar 30, 2010 at 2:51 pm
    Mar 30, 2010 at 5:17 pm
  • useR's, I want to be able to rotate a matrix 90 degrees, clockwise. For example, [,1] [,2] [,3] [,1] 1 2 1 [,2] 3 2 6 [,3] 4 5 3 I want to rotate it, so that it looks like this... [,1] [,2] [,3] [,1] ...
    Dc896148Dc896148
    Mar 18, 2010 at 7:10 pm
    Mar 19, 2010 at 12:46 am
  • Good afternoon everybody, I am sorry, this question might look trivial to some of you, but I read quite a lot of stuff about package creation and I would like a bit of you advices. I would like to ...
    Jeremie SmagaJeremie Smaga
    Mar 16, 2010 at 9:04 am
    Mar 17, 2010 at 9:27 am
  • Hello, I am using RmySQL and would like to iterate through a few queries. I would like to use sprintf but I think I'm having problems mixing and matching the sprintf syntax and the SQL regex. I have ...
    Alison wallerAlison waller
    Mar 8, 2010 at 1:06 pm
    Mar 11, 2010 at 4:12 pm
  • I am working with the combinations function (available in the gtools package). However, rather than store all of the possible combinations I would like to check each combination to see if it meets a ...
    Herm WalshHerm Walsh
    Mar 3, 2010 at 3:15 am
    Mar 8, 2010 at 6:38 pm
  • I came across this notice of an upcoming webinar. The issues identified in the first paragraph below seem to me exactly those that the R project is designed to address. The claim that "most research ...
    John MaindonaldJohn Maindonald
    Mar 1, 2010 at 12:04 am
    Jul 1, 2010 at 6:48 pm
  • Dear all, I have an issue trying to install new packages (have tried with RODBC_1.3-1, gplots_2.6.1, gtools_2.7.4 packages) and get the same error message : "Error in library(gplots) : there is no ...
    Martin ValereMartin Valere
    Mar 25, 2010 at 9:57 am
    Apr 20, 2010 at 6:08 am
  • bRotheRs & sisteRs, I am once again attempting to learn enough Latex voodoo to get something done, and failing comically. The document "RJAuthorguide.pdf" mentions that one can get page width figures ...
    Jim LemonJim Lemon
    Mar 29, 2010 at 1:21 am
    Mar 29, 2010 at 10:33 am
  • First of all, I really like R! Still being a newbie, I find things (the difficult ones) to be very simple. Alas, some 'simple' things still escape me. (Maybe the tutorials are often too much focused ...
    Uwe DippelUwe Dippel
    Mar 15, 2010 at 7:24 am
    Mar 21, 2010 at 8:53 am
  • Greets to the list! I am aware that this topic has been discussed several times. And I've read quite some related posts [1]. Yet, can't seem to give a solution to my problem. I have 6 data frames ...
    Nikos AlexandrisNikos Alexandris
    Mar 11, 2010 at 12:33 pm
    Mar 20, 2010 at 2:38 am
  • (I am reposting this question after a few months without a solution...) Hi all, I am trying to read a .txt file, with Hebrew column names, but without success. I uploaded an example file to ...
    Tal GaliliTal Galili
    Mar 18, 2010 at 9:40 pm
    Mar 19, 2010 at 2:59 pm
  • Dear list, I have a contingency table : a <- letters[1:3] t <- table(a) I'm looking for a way to transform this table into data frame, as follows : Freq a 1 b 1 c 1 I used : df <- as.data.frame(t, ...
    Carlos PettiCarlos Petti
    Mar 17, 2010 at 9:45 am
    Mar 17, 2010 at 11:23 am
  • Hi all, I thought that readers of R-Help might find the following article at ScienceNews of interest: Odds Are, It's Wrong Science fails to face the shortcomings of statistics By Tom Siegfried March ...
    Marc SchwartzMarc Schwartz
    Mar 15, 2010 at 4:22 pm
    Mar 16, 2010 at 8:52 pm
  • Um texto embutido e sem conjunto de caracteres especificado foi limpo... Nome: n?o dispon?vel Url: <https://stat.ethz.ch/pipermail/r-help/attachments/20100312/18a65fa3/attachment.pl
    Nilza BARROSNilza BARROS
    Mar 12, 2010 at 2:49 pm
    Mar 16, 2010 at 1:19 am
  • +1--this is the single most-annoying issue with R that I know of. My usual solution, after accomplishing nothing as R spins idly for a couple hours, is to kill the process and lose any un-saved ...
    Adam D. I. KramerAdam D. I. Kramer
    Mar 15, 2010 at 6:42 pm
    Mar 15, 2010 at 9:38 pm
  • Hi: I have a two large files (over 300K lines). file 1: Name X UK 199 UK 230 UK 139 ...... UAE 194 UAE 94 File 2: Name X Y UK 140 180 UK 195 240 UK 304 340 .... I want to select X of File 1 and ...
    Adrian JohnsonAdrian Johnson
    Mar 14, 2010 at 3:14 am
    Mar 14, 2010 at 6:56 am
  • Hi, A number of people have suggested "I read the manuals"... Could someone help me by telling me where the primary start point is please? For example, I am interested in writing functions with ...
    ManInMoonManInMoon
    Mar 12, 2010 at 9:41 am
    Mar 13, 2010 at 3:50 pm
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David Winsemius: 169 posts Gabor Grothendieck: 102 posts Jim holtman: 75 posts Duncan Murdoch: 65 posts Petr PIKAL: 64 posts Henrique Dallazuanna: 63 posts Jim Lemon: 61 posts Uwe Ligges: 61 posts Sharpie: 49 posts ManInMoon: 42 posts Tal Galili: 41 posts Ted Harding: 40 posts Rolf Turner: 35 posts Dieter Menne: 34 posts Marc Schwartz: 34 posts Ivan Calandra: 31 posts Peter Ehlers: 31 posts Barry Rowlingson: 30 posts Greg Snow: 27 posts Dimitri Liakhovitski: 26 posts
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