Grokbase Groups R r-help July 2007

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740 discussions - 2,147 posts

  • Hi folks, I'm having some trouble understanding the intricacies of panel functions. I wish to create three side-by-side graphs, each with different data-- so far, so good: I rbind() the data, add a ...
    Jonathan WilliamsJonathan Williams
    Jul 11, 2007 at 4:40 pm
    Jul 17, 2007 at 8:22 am
  • Dear Rhelpers, Is there a faster way than below to set a vector based on values from another vector? I'd like to call a pre-existing function for this, but one which can also handle an arbitrarily ...
    Keith Alan ChamberlainKeith Alan Chamberlain
    Jul 4, 2007 at 1:44 pm
    Jul 4, 2007 at 6:20 pm
  • I'm running windows xp, R 2.3.1 with maptools 0.6-6, I guess. When plotting from a large SpatialLinesDataFrame and using xlim & ylim to reduce the area, the plot axes automatically have the same ...
    Folkes, MichaelFolkes, Michael
    Jul 10, 2007 at 8:23 pm
    Sep 5, 2007 at 8:56 pm
  • Hi: We are having some very strange problems with R on WIndows, both with R 2.4.1 and R 2.5.0. The following command: on my Mac downloads a netcdf file, which I can open just fine using the ncdf ...
    Roy MendelssohnRoy Mendelssohn
    Jul 3, 2007 at 8:30 pm
    Jul 23, 2007 at 2:38 pm
  • Dear useRs, Lately I noticed a strange warning in the summary of a lm-object. Any idea what this warning is about? I'm using R 2.5.1 on Win XP pro. Call: lm(formula = y ~ x) Residuals: Min 1Q Median ...
    ONKELINX, ThierryONKELINX, Thierry
    Jul 18, 2007 at 3:42 pm
    Jul 25, 2007 at 10:57 am
  • How on Earth can I know what are the arguments of any of the functions of the tcl/tk package? I tried hard to find, using all search engines available, looking deep into keywords of R, python's ...
    Alberto MonteiroAlberto Monteiro
    Jul 5, 2007 at 8:08 pm
    Jul 6, 2007 at 12:38 pm
  • Hi, I need to build ROC curve in R, can you please provide data steps / code or guide me through it. Thanks and Regards Rithesh M Mohan
    Rithesh M. MohanRithesh M. Mohan
    Jul 26, 2007 at 5:56 am
    Aug 4, 2007 at 1:29 pm
  • Hello all, I have a vector of character strings, in which I have letters, numbers, and symbols. What I wish to do is obtain a vector of the same length with just the numbers. A quick example - ...
    Jul 30, 2007 at 11:58 am
    Jul 31, 2007 at 8:05 pm
  • Greetings, I have a seemingly simple task which I have not been able to solve today. I want to construct a symmetric matrix of arbtriray size w/o using loops. The following I thought would do it: p ...
    Gregory GentlemenGregory Gentlemen
    Jul 28, 2007 at 3:28 am
    Jul 31, 2007 at 5:21 pm
  • Hello, I'm looking for a solution for the following problem: 1) I have a folder with several csv files; each contains a set of measurement values 2) The measurements of each file belong to a position ...
    Jul 30, 2007 at 8:00 am
    Jul 31, 2007 at 10:58 am
  • Hi everyone I have a problem about "infinite". If I type 10^308, R shows "1e+308" When I type 10^309, R shows "Inf" So, we know if a value is large than 1.XXXe+308, R will show "Inf" How can i do let ...
    Jul 23, 2007 at 9:17 am
    Jul 28, 2007 at 4:16 pm
  • Dear all, I need a suggest to obtain the max of this function: Max x1*0.021986+x2*0.000964+x3*0.02913 with these conditions: x1+x2+x3=1; radq((x1*0.114434)^2+(x2*0.043966)^2+(x3*0.100031)^2)=0.04; x1 ...
    Jul 16, 2007 at 8:49 pm
    Jul 18, 2007 at 1:38 am
  • Hello, is it possible to obtain type III sums of squares for a nested model as in the following: lmod <- lm(resp ~ A * B + (C %in% A), mydata)) I have tried library(car) Anova(lmod, type="III") but ...
    Carsten JaegerCarsten Jaeger
    Jul 10, 2007 at 11:14 am
    Jul 12, 2007 at 2:08 pm
  • Dear useRs, I recently began a job at a very large and heavily bureaucratic organization. We're setting up a research office and statistical analysis will form the backbone of our work. We'll be ...
    Eric DoviakEric Doviak
    Jul 28, 2007 at 6:07 pm
    Aug 4, 2007 at 11:38 am
  • Hi, Is it possible to break using if-condition during the recursive function? Here is a function which almost works. It is for inorder-tree-walk. iotw<-function(v,i,Stack,Indexes) # input: a vector ...
    Atte TenkanenAtte Tenkanen
    Jul 15, 2007 at 2:06 pm
    Jul 15, 2007 at 8:15 pm
  • Dear All, I am trying to solve the following maximization problem, but I cannot have rgenoud giving me a reliable solution. Any ideas? Thanks in advance, Paul ---------------------------- ...
    Paul SmithPaul Smith
    Jul 3, 2007 at 8:10 pm
    Jul 4, 2007 at 2:22 pm
  • Hi all, If the question below as been answered before I apologize for the posting. I would like to get the frequencies of occurrence of all values in a given variable in a multivariate dataset. In ...
    Allan KamauAllan Kamau
    Jul 24, 2007 at 4:29 pm
    Jul 28, 2007 at 12:48 pm
  • hi, first I want to say that I'm new here, and new with copula and R. That is the reason why I'm writing, if somebody can help me. I have to make an example of Copula. On internet I've found this ...
    Jul 16, 2007 at 10:41 am
    Jul 23, 2007 at 2:50 pm
  • Hey all; I'm a beginner++ user of R, trying to use it to do some processing of data sets of over 1M rows, and running into a snafu. imagine that my input is a huge table of transactions, each linked ...
    Jul 4, 2007 at 7:01 pm
    Jul 5, 2007 at 4:42 pm
  • Hi. I recently tried the following in R 2.5.1 on Windows XP: [,1] [1,] -2.664427e-17 [1] 0 (I got the same result with R 2.4.1 on a different Windows XP machine.) I expect this issue is very familiar ...
    Talbot KatzTalbot Katz
    Jul 27, 2007 at 10:30 pm
    Jul 31, 2007 at 10:10 am
  • I want to use R to run a reaction-time experiment: Something appears on the screen, I respond by typing something (one keystroke), the system measures the speed of my response. R would be great for ...
    Seth RobertsSeth Roberts
    Jul 22, 2007 at 4:38 pm
    Jul 23, 2007 at 4:06 pm
  • Hi everyone, I did my homework and read the posting guideline :-) I want to eMail the results of a computing automatically. So I get the results (the parameters of a garch process) and I want to ...
    Thomas SchwanderThomas Schwander
    Jul 12, 2007 at 1:52 pm
    Jul 13, 2007 at 7:59 am
  • Dear all, Has someone implemented in R (or any other language) Knol DL, ten Berge JMF. Least-squares approximation of an improper correlation matrix by a proper one. Psychometrika, 1989, 54, 53-61 ...
    Jens OehlschlägelJens Oehlschlägel
    Jul 13, 2007 at 12:25 pm
    Dec 5, 2007 at 11:59 pm
  • Hello, I use a RODBC connection to a MySQL server on a Debian machine. The call to odbcConnect() seems to be ok, but the result of the first sqlFetch(channel,"t_studie") retrieves this data frame ...
    Bernhard WellhöferBernhard Wellhöfer
    Jul 6, 2007 at 9:45 am
    Sep 26, 2007 at 11:29 am
  • Hi All: I'm developing an application program using C++. From my C++ code, I would call some R program I have written. I' wondering if R provide some compiler that can compile R program into ...
    Feng QiuFeng Qiu
    Jul 29, 2007 at 8:35 pm
    Jul 31, 2007 at 5:56 am
  • R I am taking an excel dataset and reading it into R using read.table. (actually I am dumping the data into a .txt file first and then reading data in to R). Here is snippet: Date Price Open.Int ...
    Alex ParkAlex Park
    Jul 19, 2007 at 7:35 pm
    Jul 26, 2007 at 4:25 pm
  • Hello, I think I have a mental block when it comes to working with lists. lapply and sapply appear to do some magical things, but I can't seem to master their usage. As an example, I would like to ...
    Jul 22, 2007 at 7:39 pm
    Jul 24, 2007 at 6:29 pm
  • Hi Sir I have made a data set having 23 stations of rainfall. when I use the attach function to approach indevidual stations then following error occurr. * attach(data)* * S.Sharif #S.Sharif is the ...
    Amna khanAmna khan
    Jul 22, 2007 at 10:25 am
    Jul 23, 2007 at 10:56 am
  • Hi, I am also a quite new user of R and would like to ask you for help: I have a data frame where all columns are numeric variables. My aim is to convert one columnt in factors. Example: MD 0.2 0.1 ...
    Ing. Michal Kneifl, Ph.D.Ing. Michal Kneifl, Ph.D.
    Jul 18, 2007 at 5:36 pm
    Jul 19, 2007 at 8:08 am
  • Hi, I am trying to learn some basic statistics stuff but I cannot find any elementary statistics exercises using R language. Using RKward would be even better... I need that in analysing sociological ...
    Donatas G.Donatas G.
    Jul 11, 2007 at 1:27 pm
    Jul 17, 2007 at 9:26 am
  • hello, first I create a list: l <- list("1"<-c(1,2,3)) then I run the following cycle, it takes over a minute(!) to complete on a very fast mashine: for(i in (1:10^5)) l[[length(l)+1]] <- c(i,i+1,i) ...
    Balazs TormaBalazs Torma
    Jul 13, 2007 at 10:19 am
    Jul 13, 2007 at 12:01 pm
  • Hi All, I am trying to make a loop for a function and I am using the following codes. "p" and "var" are some matrix obtained before. I would like to apply the function "gpdlow" for i in 1:12 and get ...
    Jul 5, 2007 at 10:16 am
    Jul 5, 2007 at 4:30 pm
  • Hello All, The basic premise of what I want to do is the following: I have 20 "entities" for which I have ~500 measurements each. So, I have a matrix of 20 rows by ~500 columns. The 20 entities fall ...
    James R. GrahamJames R. Graham
    Jul 2, 2007 at 3:24 pm
    Jul 2, 2007 at 9:18 pm
  • Hi everybody, I am a new R user. Is there any package devoted to "text mining" analysis in R ? Thanks Gilles lepape.gilles at
    LE PAPE GillesLE PAPE Gilles
    Jul 6, 2007 at 3:51 pm
    Feb 6, 2009 at 6:58 am
  • Dear R users, I used R to draw many histograms and I would like to automatically save them into a jpeg file. I tried the following code since I know .ps file could be saved like this way ...
    Ding, RebeccaDing, Rebecca
    Jul 20, 2007 at 3:34 pm
    Aug 2, 2007 at 10:48 am
  • Hi, is there a grayscale setting for lattice plots? I like the default color settings. I also like the settings that are available for setting black and white with something like this ...
    Patrick DrechslerPatrick Drechsler
    Jul 28, 2007 at 9:49 pm
    Aug 1, 2007 at 7:46 pm
  • Greetings to the group, I would like to know if some one could help me with plot 3-d column graph of a matrix (3-d column graph in Excel). Many thanks in advance. Regards, Dong
    Dong GUO 郭东Dong GUO 郭东
    Jul 27, 2007 at 2:45 pm
    Aug 1, 2007 at 3:05 am
  • Hi everybody, I am working with gams and I have found some questions when plotting gams models. I am using mgcv, and my model looks something like this: model<- gam(x ~ s(lat,long)) I can plot the ...
    Lucia ZarauzLucia Zarauz
    Jul 24, 2007 at 11:23 am
    Jul 25, 2007 at 10:43 am
  • Intro to Data Mining for Absolute Beginners (no charge) This one-hour webinar is a perfect place to start if you are new to data mining and have little-to-no background in statistics or machine ...
    Lisa SolomonLisa Solomon
    Jul 20, 2007 at 6:03 pm
    Jul 23, 2007 at 12:38 pm
  • Hi, I cannot figure out how to draw a certain plot: could someone help me out? I have this data.frame from a survey that looks like something like this: col1 col2 col3 col4 1 5 5 4 5 2 3 5 3 ...
    Donatas G.Donatas G.
    Jul 16, 2007 at 7:06 am
    Jul 20, 2007 at 12:59 pm
  • Hello All, I have a simple question based on how things are labeled on my heat map; particularly, there is this annoying "X" that appears before the numeric value of all the labels of my columns ...
    Suzanne MatthewsSuzanne Matthews
    Jul 19, 2007 at 12:07 am
    Jul 19, 2007 at 4:34 pm
  • essai <- odbcConnect("ORESTE_prod", uid="osis_r", pwd="12miss15" ,case="oracle") ... 1315 <NA ORESTE S_PROFESSIONS_OLD TABLE <NA 1316 <NA ORESTE S_PROVENANCES TABLE <NA 1317 <NA ORESTE S_SEXES TABLE ...
    Jul 17, 2007 at 7:24 am
    Jul 19, 2007 at 3:36 pm
  • How do I make Lithuanian characters display correctly in R graphics? Instead of the special characters for Lithuanian language I get question marks... I use Ubuntu Feisty, the locale is utf-8 ... Do ...
    Donatas G.Donatas G.
    Jul 13, 2007 at 8:50 am
    Jul 13, 2007 at 9:20 pm
  • dear r experts: I would appreciate advice on how to get the p-value from the object 'sr' created with the function survreg() as given below. vlad sr<-survreg(s~groups, dist="gaussian") Coefficients ...
    Jul 11, 2007 at 9:42 am
    Jul 11, 2007 at 3:10 pm
  • Hi all, There have been quite a few threads in the recent months pertaining to the ability to directly write native Excel (.xls) files from R. For example, exporting R matrices and/or data frames to ...
    Marc SchwartzMarc Schwartz
    Jul 8, 2007 at 8:20 pm
    Jul 10, 2007 at 2:36 pm
  • Take for example the following data.frame: a<-c(1,1,5) b<-c(3,2,3) c<-c(5,1,5)<-data.frame(a=a,b=b,c=c) I'd like to be able to use unique(, but have unique() ...
    Andrew YeeAndrew Yee
    Jul 9, 2007 at 1:12 pm
    Jul 9, 2007 at 3:07 pm
  • I want to gain thousands of random sampling data by randomizing the presence-absence data. Meantime, one important limition is that the row and column sums must be fixed. For example, the data "tst" ...
    Zhang JianZhang Jian
    Jul 7, 2007 at 7:30 pm
    Jul 9, 2007 at 8:05 am
  • Hi All, is there Levene' test in R ? If not ,Could you give me some advice about Levene test with R? Thanks a lot! I am waiting for yours.
    Along zengAlong zeng
    Jul 5, 2007 at 2:36 pm
    Jul 6, 2007 at 11:55 am
  • Dear all, I have a very small script to plot a function. Here it is: ########################################## sinca <- function(N,th) { return(sin((N+0.5)*th)/sin(0.5*th)) } plot_sinca <- ...
    James FoadiJames Foadi
    Jul 5, 2007 at 5:39 pm
    Jul 6, 2007 at 8:19 am
  • I am not understanding something about generating PNG plots. I have tried several ways to obtain something other than a transparent background, but nothing I've done seems to change the background ...
    D. R. EvansD. R. Evans
    Jul 31, 2007 at 4:22 pm
    Aug 2, 2007 at 2:23 pm
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Prof Brian Ripley: 89 posts Jim holtman: 70 posts Gabor Grothendieck: 59 posts Hadley wickham: 45 posts Stephen Tucker: 36 posts Deepayan Sarkar: 34 posts Peter Dalgaard: 34 posts Uwe Ligges: 34 posts Duncan Murdoch: 28 posts Greg Snow: 26 posts Livia: 25 posts Marc Schwartz: 24 posts Ted Harding: 24 posts Chuck Cleland: 19 posts John Kane: 18 posts Henrique Dallazuanna: 17 posts RAVI VARADHAN: 17 posts Benilton Carvalho: 16 posts ONKELINX, Thierry: 15 posts Frank E Harrell Jr: 14 posts
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