Grokbase Groups R r-help August 2007

Search Discussions

729 discussions - 2,244 posts

  • A common process when data is obtained in an Excel spreadsheet is to save the spreadsheet as a .csv file then read it into R. Experienced users might have learned to be wary of dates (as I have) but ...
    David ScottDavid Scott
    Aug 28, 2007 at 2:11 am
    Sep 6, 2007 at 6:29 pm
  • I do not think anyone has answered this. This is a conceptual problem, indeed. To be able to estimate a subject effect, you need to have repeated measurements (several lines) per observed subject ...
    Lorenz GygaxLorenz Gygax
    Aug 2, 2007 at 9:09 am
    Aug 31, 2007 at 8:47 pm
  • If I have a calculated t can I get the probability associated with it using an R function by giving it the df and t? I know I can do the whole calculation using t.test() or get the t-distribution ...
    Nair, Murlidharan TNair, Murlidharan T
    Aug 1, 2007 at 6:43 pm
    Aug 3, 2007 at 3:06 pm
  • Simple question how can you position text in the top left hand corner of a plot? I am plotting multiple plots using par(mfrow=c(2,3)) and all I want to do is label these plots a), b), c) etc. I have ...
    Daniel BrewerDaniel Brewer
    Aug 7, 2007 at 3:08 pm
    Feb 7, 2012 at 8:55 pm
  • Hi, It is possible to use a shell command inside a R script? I'm write a R script and I like to put somes shell commands inside to R. Somethink like: convert fig01.png fig01.xpm or sed ..., etc. It ...
    Ronaldo Reis JuniorRonaldo Reis Junior
    Aug 24, 2007 at 10:58 am
    Aug 24, 2007 at 8:41 pm
  • If my sample size is small is there a particular switch option that I need to use with t.test so that it calculates the t ratio correctly? Here is a dummy example? á =0.05 Mean pain reduction for A ...
    Nair, Murlidharan TNair, Murlidharan T
    Aug 7, 2007 at 7:39 pm
    Aug 10, 2007 at 5:13 am
  • Hi, I've been having similar experiences and haven't been able to substantially improve the efficiency using the guidance in the I/O Manual. Could anyone advise on how to improve the following ...
    Michael CassinMichael Cassin
    Aug 9, 2007 at 5:15 pm
    Aug 10, 2007 at 8:26 am
  • The FAQ Section 7 is a very useful place for new users to find out any number of R idiosycracies. However there is no numbering on the FAQ Table of Content or on the Sections Tables of Contents. An ...
    John KaneJohn Kane
    Aug 23, 2007 at 11:44 am
    Aug 27, 2007 at 1:39 pm
  • Hi, I am getting some strange results using round - it seems that it depends if the number before the decimal point is odd or even .... For example: While i would expect that round(2.5) be 3 and not ...
    Monica PisicaMonica Pisica
    Aug 2, 2007 at 8:16 pm
    Aug 6, 2007 at 11:02 am
  • Hello, I wanted to create a histogram, but somehow I got stuck... The interval limits are: x = 1, 2, 3, 3.5, 4.5, 5, 5.5 The interval widths are therefore: 1, 1, 0.5, 1, 0.5, 0.5 Nothing I tried ...
    Aug 23, 2007 at 7:36 am
    Aug 31, 2007 at 10:10 am
  • Hi there, I would like some advice, not so much about how to use R, but about software that I need to complement R. I've rooted around in the FAQ's and done a few searches on this mailing list but ...
    Martin BrownMartin Brown
    Aug 18, 2007 at 9:22 pm
    Aug 20, 2007 at 2:52 pm
  • Dear r-helpers, In my previous message there were comments in the code that may have made cutting and pasting awkward. Here it is w/o them. I have two questions: (1) The following produces a pdf with ...
    Michael KubovyMichael Kubovy
    Aug 11, 2007 at 8:31 pm
    Aug 13, 2007 at 10:46 pm
  • Hi R users, Is there a function in R, which does some calculation only for the month end in a daily data?... In other words, is there a command in R, equivalent to "last." function in SAS? BR, Shubha
    Shubha Vishwanath KaranthShubha Vishwanath Karanth
    Aug 29, 2007 at 11:31 am
    Aug 30, 2007 at 6:14 pm
  • Hi, I have a large amount of data that I would like to create a histogram of and plot and do things with in R. It is pretty much impossible to read the data into R, so I have written a program to bin ...
    Nick ChorleyNick Chorley
    Aug 15, 2007 at 8:30 am
    Aug 16, 2007 at 7:54 am
  • Dear all, I am attempting to explain patterns of arthropod family richness (count data) using a regression model. It seems to be able to do a pretty good job as an explanatory model (i.e ...
    Matthew and Kim BowserMatthew and Kim Bowser
    Aug 9, 2007 at 12:30 am
    Aug 13, 2007 at 4:51 pm
  • Hi All, Can somebody tell me how to use R to combine p values using Fisher's method? thanks. Jiong The email message (and any attachments) is for the sole use of the intended recipient(s) and may ...
    Jiong Zhang, PhDJiong Zhang, PhD
    Aug 16, 2007 at 7:50 pm
    Jul 8, 2010 at 8:20 pm
  • Dear R-users, I have found this not-so-recent post in the archives - - while I was looking for a particular way to reorder factor levels. The ...
    Aug 28, 2007 at 5:36 pm
    Sep 20, 2007 at 3:18 am
  • Dear all, I am struggling to understand this. What happens when you raise a negative value to a power and the result is a very large number? B [1] 47.73092 [1] -3.190824e+81 # seems fine # now this ...
    Willem vervoortWillem vervoort
    Aug 30, 2007 at 3:08 pm
    Aug 31, 2007 at 7:56 am
  • How do I include bar values in a barplot (or other R graphics, where this could be applicable)? To make sure I am clear I am attaching a barplot created with which has barplot values ...
    Donatas G.Donatas G.
    Aug 7, 2007 at 7:09 pm
    Aug 27, 2007 at 6:45 pm
  • Hi R-users, I have to define a noise level function L and its energy in the various moment of the day by: if time is between 18:00:00 and 23:59:59 then L[j] <- L[j]+5 and W <- 10^((L+5)/10) if time ...
    KOITA Lassana - STAC/ACEKOITA Lassana - STAC/ACE
    Aug 10, 2007 at 5:05 pm
    Aug 13, 2007 at 9:31 am
  • Greg, I'm going to join issue with your here! Not that I'll go near advocating "Excel-style" graphics (abominable, and the Patrick Burns URL which you cite is remarkable in its restraint). Also, I'm ...
    Ted HardingTed Harding
    Aug 8, 2007 at 9:52 pm
    Aug 10, 2007 at 3:46 pm
  • Hi! I am using R to process some community survey data. Several item responses are recorded via a 7-point Likert-Scale. As I have coded the responses, 1 represents high agreement, and 7 high ...
    Alexis DelevettAlexis Delevett
    Aug 4, 2007 at 2:55 pm
    Aug 5, 2007 at 8:08 am
  • Hi all, What are current methods people use in R to identify mis-spelled column names when selecting columns from a data frame? Alice Johnson recently tackled this issue (see [BioC] posting below) ...
    Steven McKinneySteven McKinney
    Aug 3, 2007 at 5:37 pm
    Aug 4, 2007 at 5:47 pm
  • hi everyone: I have a Dell Server that has a Xeon processor, and I would like to use the best ATLAS posted in the R website. I find that R has ATLAS for core2duo and P4. I am not sure which one of ...
    Hui xieHui xie
    Aug 29, 2007 at 3:20 am
    Aug 31, 2007 at 9:11 am
  • Hi, Maybe this is more a programming questions than a specific R-project question, but maybe there is someone who can point me in the right direction. I have a picture of cirkels which I took with a ...
    Bart JoosenBart Joosen
    Aug 23, 2007 at 7:58 pm
    Aug 28, 2007 at 12:02 am
  • Hi All, I'm using the subset function to select a list of variables, some of which are contiguous in the data frame, and others of which are not. It works fine when I use the form ...
    Muenchen, Robert A (Bob)Muenchen, Robert A (Bob)
    Aug 26, 2007 at 8:37 pm
    Aug 27, 2007 at 6:28 pm
  • Hi, Could someone please tell me how to perform a Mann-Whitney U test on a dataset with 2 groups where one group has more data values than another? I have split up my 2 groups into 2 columns in my ...
    Natalie O'TooleNatalie O'Toole
    Aug 14, 2007 at 8:45 pm
    Aug 15, 2007 at 8:13 pm
  • All: I am trying to fit a mixture of 2 normals with 110 million observations. I am running R 2.5.1 on a box with 1gb RAM running 32-bit windows and I continue to run out of memory. Does anyone have ...
    Tim VictorTim Victor
    Aug 4, 2007 at 5:45 pm
    Aug 8, 2007 at 3:01 pm
  • Hi I am trying to save some plots in a postscript file. When I generate the plots in the main window, they appear correctly - their orientation is landscape (i.e., horizontal). However, when I open ...
    Miruna Petrescu-PrahovaMiruna Petrescu-Prahova
    Aug 2, 2007 at 8:58 pm
    Aug 3, 2007 at 7:06 pm
  • Hello, I apologise if someone has already answered this but I searched and googled but didn't find anything. I have a matrix which gives me the similarity of each item to each other. I would like to ...
    H. Paul BentonH. Paul Benton
    Aug 28, 2007 at 9:25 pm
    Oct 5, 2007 at 12:00 am
  • I am working with census data. My columns of interest are... PercentOld - the percentage of people in each county that are over 65 County - the county in each state State - the state in the US There ...
    Cory NissenCory Nissen
    Aug 31, 2007 at 1:08 pm
    Sep 4, 2007 at 12:43 pm
  • Hello I am trying to evaluate an Incomplete gamma function in R. Library Zipfr gives the Igamma function. From Mathematica, I have: "Gamma[a, z] is the incomplete gamma function." In[16] ...
    Aug 30, 2007 at 11:29 pm
    Sep 3, 2007 at 8:29 am
  • Plotting with 2 x axis? One axis inside another, for example salary within state, 1-50 | 50 ? 100 | 100+ | 1- 50 | 50 -100 | 100+ | ? repeated bins for salary AL ! AR ?? more states The values are ...
    Richard YanickyRichard Yanicky
    Aug 30, 2007 at 2:56 am
    Aug 31, 2007 at 6:55 pm
  • The subject says it all really: I've tried hitting control-C (multiple times), but that doesn't seem to be a reliable way to interrupt a long calculation. What is the right way to interrupt a ...
    D. R. EvansD. R. Evans
    Aug 29, 2007 at 5:43 pm
    Aug 30, 2007 at 6:29 pm
  • Hello, I am sure I am not the only person with this problem. I have a list with n elements, each consisting of a single column matrix with different row lengths. Each row has a name ranging from A to ...
    Christopher MarcumChristopher Marcum
    Aug 24, 2007 at 3:22 am
    Aug 24, 2007 at 4:12 pm
  • Hi, I encounter a situation where I have a list whose element is a column matrix. Says, $'1' [,1] 1 2 3 $'2' [,1] 4 5 6 Is there fast way to collapse the list into a matrix like a cbind operation in ...
    Aug 20, 2007 at 1:13 am
    Aug 20, 2007 at 5:13 am
  • Hi platform i686-pc-linux-gnu arch i686 os linux-gnu system i686, linux-gnu status major 2 minor 5.1 year 2007 month 06 day 27 svn rev 42083 language R version.string R version 2.5.1 (2007-06-27) I ...
    Rainer M. KrugRainer M. Krug
    Aug 16, 2007 at 12:57 pm
    Aug 18, 2007 at 4:59 am
  • I'd like to fit linear models on very large datasets. My data frames are about 2000000 rows x 200 columns of doubles and I am using an 64 bit build of R. I've googled about this extensively and went ...
    Aug 16, 2007 at 8:24 pm
    Aug 17, 2007 at 6:41 pm
  • hello, I asked about this simulation a few days ago, but still i can't get what i need. I have 2 units: icu and regular. from icu I want to take 200 observations from binomial distribution, when ...
    Sigalit mangut-leibaSigalit mangut-leiba
    Aug 11, 2007 at 5:57 pm
    Aug 16, 2007 at 7:36 am
  • Can R invert a 160000x160000 matrix with all positive numbers? Thanks a lot!
    Jiao YangJiao Yang
    Aug 13, 2007 at 8:12 pm
    Aug 14, 2007 at 2:44 pm
  • Hello all, I am working with a 1000x1000 matrix, and I would like to return a 1000x1000 matrix that tells me which value in the matrix is greater than a theshold value (1 or 0 indicator). i have ...
    Lanre OkusanyaLanre Okusanya
    Aug 10, 2007 at 6:05 pm
    Aug 10, 2007 at 6:53 pm
  • Dear List, I have 30 data files with different numbers of lines (31 and 33) that I want to skip before reading the files. If I use the skip option I can only choose either to skip 31 or 33 lines. The ...
    Tom CohenTom Cohen
    Aug 2, 2007 at 9:14 pm
    Aug 3, 2007 at 12:41 pm
  • Hi, I have a dataframe containing data from individuals 1, ..., 12 (grouping variable "g" in the data frame below), which belong either to "A" or "B" (grouping variable "f"): set.seed(1) tmp <- ...
    Christof BiglerChristof Bigler
    Aug 30, 2007 at 12:19 pm
    Sep 2, 2007 at 6:57 pm
  • I have created an xyplot of a time series with the following code... win.graph(width = 10, height = 7) panel1 = function(x, y) { panel.loess(x, y, lwd=2.5, span=0.5, col="gray") panel.xyplot(x, y, ...
    Dave HewittDave Hewitt
    Aug 30, 2007 at 5:52 pm
    Aug 31, 2007 at 9:57 pm
  • I have a cox.obj named obj, obj <- coxph( Surv(time, status) ~ group, now I want to retrieve the p-value from obj, so that I can run this hundreds of times and plot out the distribution of ...
    Aug 29, 2007 at 3:40 pm
    Aug 31, 2007 at 11:15 am
  • How do people go about synchronizing multiple workspaces on different workstations? I tend to wind up with projects spread around the various machines I work on. I find that placing the directories ...
    Eric TurkheimerEric Turkheimer
    Aug 22, 2007 at 1:20 pm
    Aug 31, 2007 at 3:24 am
  • Dear R-users, I have written a small application (in visual basic) that automatically generate some R scripts. I would like to execute these scripts when my application is being closed. My problem is ...
    Aug 24, 2007 at 5:47 pm
    Aug 28, 2007 at 1:31 am
  • Hi, I am editing a document for submission to the R-news newsletter, and in my article my Sweave code inserts a dynamically generated PDF report that my R program generates. However, when I insert ...
    Arjun Ravi NarayanArjun Ravi Narayan
    Aug 21, 2007 at 4:41 pm
    Aug 27, 2007 at 5:35 pm
  • I have the code below which gives me what I want for temp based on logvec but I was wondering if there was a shorter way ( i.e : a one liner ) without having to initialize temp to zeros. This is ...
    Leeds, Mark (IED)Leeds, Mark (IED)
    Aug 24, 2007 at 9:12 pm
    Aug 25, 2007 at 2:38 am
  • Hi All, I'm used to running R on Windows & learning Linux. I know ESS is the way to go in the long run, but I'm trying now to just understand the command line. I can interactively enter commands, see ...
    Muenchen, Robert A (Bob)Muenchen, Robert A (Bob)
    Aug 24, 2007 at 1:56 pm
    Aug 24, 2007 at 8:38 pm
Group Navigation
period‹ prev | Aug 2007 | next ›
Group Overview
groupr-help @

677 users for August 2007

Gabor Grothendieck: 110 posts Prof Brian Ripley: 97 posts Uwe Ligges: 53 posts Duncan Murdoch: 49 posts Greg Snow: 38 posts Jim holtman: 36 posts Henrique Dallazuanna: 35 posts John Kane: 35 posts Deepayan Sarkar: 28 posts Moshe Olshansky: 26 posts Vladimir Eremeev: 22 posts Jim Lemon: 21 posts Rolf Turner: 21 posts Charles C. Berry: 20 posts Gang Chen: 20 posts Petr PIKAL: 20 posts Sébastien: 20 posts Ted Harding: 19 posts Thomas Lumley: 19 posts Stephen Tucker: 18 posts
show more