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983 discussions - 3,089 posts

  • Can someone please tell me what is up with na.action in aggregate? My (somewhat) reproducible example: (I say somewhat because some lines wouldn't run in a separate session, more below) set.seed(100) ...
    Gene LeynesGene Leynes
    Feb 4, 2011 at 9:07 pm
    Feb 7, 2011 at 6:44 pm
  • Dear R-help, I am doing clustering via finite mixture model. Please suggest some packages in R to find clusters via finite mixture model with continuous variables. And also I wish to verify the ...
    Karuna mKaruna m
    Feb 1, 2011 at 7:15 am
    Feb 26, 2011 at 12:45 pm
  • I wish to generate a vector of uniformly distributed data with a defined correlation to another vector The only function I have been able to find doing something similar is corgen from the library ...
    Søren FaurbySøren Faurby
    Feb 20, 2011 at 2:17 am
    Feb 22, 2011 at 5:11 pm
  • This is my first attempt at this, so hopefully a few kind pointers can get me going in the right direction... I have a large data frame of 20+ columns and 20,000 rows. I'd like to evaluate the ...
    DB1984DB1984
    Feb 4, 2011 at 3:52 am
    Feb 7, 2011 at 1:51 am
  • The data is in the attachment. What I wanna get is: , , Sex = Male Eye Hair Brown Blue Hazel Green Black 32 11 10 3 Brown 53 50 25 15 Red 10 10 7 7 Blond 3 30 5 8 , , Sex = Female Eye Hair Brown Blue ...
    Lao MengLao Meng
    Feb 18, 2011 at 7:50 am
    Apr 12, 2011 at 7:30 pm
  • I've been wondering what L means in the R computing context, and was wondering if someone could point me to a reference where I could read about it, or tell me what it's called so that I can search ...
    Gene LeynesGene Leynes
    Feb 23, 2011 at 4:08 pm
    Feb 24, 2011 at 9:30 pm
  • Dear R colleagues, is there an easier way to write R packages for the own use - without RTools and TeX? With R versions < 2.10.0 it was very easy to write a package. Under the path with the package ...
    Dr. Michael WolfDr. Michael Wolf
    Feb 11, 2011 at 7:52 am
    Feb 12, 2011 at 5:15 am
  • Dear R users The following question looks simple but I have spend alot of time to solve it. I would highly appeciate your help. I have following dataset from family dataset : Here we have individuals ...
    Umesh RosyaraUmesh Rosyara
    Feb 18, 2011 at 2:21 am
    Mar 2, 2011 at 7:38 pm
  • Hi, I have a large dataset with info on individuals (B) that have been involved in projects (A) during multiple years (C). The dataset contains three columns: A, B, C. Example: A B C 1 1 a 1999 2 1 b ...
    MathijsdevaanMathijsdevaan
    Feb 14, 2011 at 5:22 pm
    Feb 23, 2011 at 6:00 pm
  • I am trying to get stock metadata from Yahoo finance (or maybe there is a better source?) here is what I did so far: yahoo.url <- "http://finance.yahoo.com/d/quotes.csv?f=j1jka2&s="; stocks <- ...
    Sam SteingoldSam Steingold
    Feb 15, 2011 at 10:20 pm
    Feb 16, 2011 at 10:15 pm
  • Hi, I am not a statistics expert, so I have this question. A linear model gives me the following summary: Call: lm(formula = N ~ N_alt) Residuals: Min 1Q Median 3Q Max -110.30 -35.80 -22.77 38.07 ...
    JanJan
    Feb 18, 2011 at 10:49 am
    Aug 14, 2012 at 11:34 pm
  • I'm trying to work out the simplest way to remove the upper and lower quantiles, in this case upper and lower 25% from an array. I can do it in two steps but when I try it in one, it fails. Is there ...
    Maas James Dr (MED)Maas James Dr (MED)
    Feb 17, 2011 at 10:08 am
    Feb 17, 2011 at 5:53 pm
  • Dear all I would like to ask you if there is a way in R to monitor in R when a value changes. Right now I use the sprintf('my variables is %d \n, j) to print the value of the variable. Is it possible ...
    AlaiosAlaios
    Feb 16, 2011 at 9:38 am
    Feb 16, 2011 at 3:09 pm
  • Has anyone heard whether Revolution Analytics is going to release this capability to the R community? http://www.businesswire.com/news/home/20110201005852/en/Revolution-Analytics-Unlocks-SAS-Data Dan ...
    Daniel NordlundDaniel Nordlund
    Feb 10, 2011 at 1:46 am
    Feb 12, 2011 at 2:48 pm
  • PLEASE HELP I actually want to do the following: a[j] = (1/(j!))*Î (i-1-d), j = 500, Î means product i = 1 to j  Yet, j! will stop at 170 and Î (i-1-d) at 172; so, a[j] will not exceed 170. I would ...
    Kiogou LydieKiogou Lydie
    Feb 1, 2011 at 8:51 pm
    Feb 8, 2011 at 8:06 pm
  • Hi All, I have two Rs, one has been installed in Windows system and another one has been installed under UNIX system. Is there any environmental variable or function to tell me which R I am using? ...
    Hui DuHui Du
    Feb 25, 2011 at 6:23 pm
    Feb 26, 2011 at 11:56 am
  • Hello to R people Does anybody know to calculate exact logistic regression in R? Does such option exist anywhere? Surprisingly, could not find it using search engine. It is hard to believe, however, ...
    DenDen
    Feb 2, 2011 at 4:43 pm
    Feb 17, 2011 at 5:54 pm
  • Dear all, I admit this is not anything to do R and even with Statistics perhaps. Strictly speaking this is a math related question. However I have some reasonable feeling that experts here would come ...
    Maithula ChandrashekharMaithula Chandrashekhar
    Feb 13, 2011 at 9:47 pm
    Feb 16, 2011 at 3:58 pm
  • I am working on a function that will remove outliers for regression analysis. I am stating that a data point is an outlier if its studentized residual is above or below 3 and -3, respectively. The ...
    KirtauKirtau
    Feb 9, 2011 at 2:11 am
    Feb 9, 2011 at 10:31 pm
  • Hello, How can I randomly sample individuals within a sites from a site (row) X species abundance (column) data frame or matrix? As an example, the matrix "abund2" made below. ##### (sorry, Im a ...
    B77SB77S
    Feb 6, 2011 at 8:25 pm
    Feb 8, 2011 at 8:34 pm
  • I am trying to read an xlsx spreadsheet (1506 rows, 501columns) all populated but getting the following error: Please advise as to how to get around this issue. Error in .jcall("RJavaTools", ...
    Nikhil JoshiNikhil Joshi
    Feb 9, 2011 at 11:12 pm
    Feb 7, 2013 at 11:13 am
  • Hi, I am running the following script for a different (much larger data frame): DF = data.frame(read.table(textConnection(" A B C D E 1 1 a 1999 1 0 2 1 b 1999 0 1 3 1 c 1999 0 1 4 1 d 1999 1 0 5 2 c ...
    MathijsdevaanMathijsdevaan
    Feb 25, 2011 at 2:31 pm
    Feb 28, 2011 at 6:58 pm
  • Hi,i would like to know what is the best way to write a procedure in R,it seems that when i run a script it doesn't wait for previouse code lines to be excuted,i would like to know how to force R to ...
    Tsvi saboTsvi sabo
    Feb 26, 2011 at 6:09 pm
    Feb 28, 2011 at 12:07 pm
  • Dear R-help, I am having a problem with the interpretation of result from validate.cph in the Design package. My purpose is to fit a cox model and validate the Somer's Dxy. I used the hypothetical ...
    VikkiyftVikkiyft
    Feb 21, 2011 at 4:46 am
    Feb 26, 2011 at 1:01 pm
  • Hi all, i have a little problem, and i think it is really simple to solve, but i dont know exactly how to. here is the "challange": i have a data.frame with n colum, i have to group 2 of them and ...
    ZemZem
    Feb 25, 2011 at 11:11 am
    Feb 25, 2011 at 9:56 pm
  • Dear all, I am a new user of R and currently trying hard to develop my own package. Here I am following this tutorial 'http://www.mathfinance.cn/how-to-create-an-R-package-in-windows/' Here it says ...
    Nipesh BajajNipesh Bajaj
    Feb 19, 2011 at 9:39 pm
    Feb 21, 2011 at 1:38 am
  • Dear R-list members, I need an help with the Multidimensional Scaling analysis (MDS). So far I used the cmdscale() command in R, but I did not get the perceptual map I would love to see, and I would ...
    Luca TurchetLuca Turchet
    Feb 14, 2011 at 12:37 pm
    Feb 15, 2011 at 12:45 pm
  • Hi all, I'm trying to figure out the effective differences between BFGS and L-BFGS-B are, besides the obvious that L-BFGS-B should be using a lot less memory, and the user can provide box ...
    Brian TsaiBrian Tsai
    Feb 25, 2011 at 5:11 am
    Feb 26, 2011 at 2:20 pm
  • Hi there, I though there has been a possibility to force the output on the console with one element per line. Instead of this: [1] 1 2 3 4 5 6 7 8 9 10 something like this [1] 1 [2] 2 [3] 3 [4] 4 [5] ...
    Antje NiederleinAntje Niederlein
    Feb 21, 2011 at 10:21 am
    Feb 21, 2011 at 2:45 pm
  • Hi, I wonder if anyone could advise me with this: I've been trying to make a standard curve in R with lm() of some standards from a spectrophotometer, so as I can express the curve as a formula, and ...
    Ben WardBen Ward
    Feb 18, 2011 at 11:29 pm
    Feb 21, 2011 at 1:59 am
  • Hi, I have been using R for close to two years now and have grown quite comfortable with the language. I am presently trying to implement an optimization routine in R (Newton Rhapson). I have some R ...
    Rohit PandeyRohit Pandey
    Feb 6, 2011 at 3:28 pm
    Feb 19, 2011 at 5:21 pm
  • Dear R people, I generated a glm logit model using a sample of a bigger set, and now I want to test the model with the bigger set. How can I do this? predict makes predictions only for a number of ...
    MaxsilvaMaxsilva
    Feb 8, 2011 at 7:42 pm
    Feb 10, 2011 at 6:37 pm
  • Hello to all, I have two dataframes, the first with two columns sunrise and sunset (for 10 years). Each of these columns is formatted for date time (ex: 01-Jan-2010 15:37:00) In the second data frame ...
    PatraopedroPatraopedro
    Feb 7, 2011 at 2:10 pm
    Feb 10, 2011 at 5:34 pm
  • Hello, I have a text file with one column containing long number but stored as string. I download the file with read.table (and colClass) and the first row of this column is : "095842087016731010" As ...
    PtitBleuPtitBleu
    Feb 9, 2011 at 12:15 pm
    Feb 10, 2011 at 8:16 am
  • Hi everybody, I have a strange behavior of the as.Date() function. For example: as.Date(36525, origin="1900-01-01'") I would expect to get 2000-01-01. But R gives me [1] "2070-01-01" I tried with ...
    Valeri FabioValeri Fabio
    Feb 8, 2011 at 4:15 pm
    Feb 9, 2011 at 11:41 pm
  • Hi all, I'm hoping someone more knowledgeable in Fortran than I can chime in with opinion. I'm the maintainer of the flashClust package that implements fast hierarchical clustering. The fortran code ...
    Peter LangfelderPeter Langfelder
    Feb 6, 2011 at 7:11 pm
    Feb 7, 2011 at 12:24 pm
  • I need to calculate the probability that a sample quantile will exceed a threshold given the size of the iid sample and the parameters describing the distribution of each observation (normal, in my ...
    Bentley CoffeyBentley Coffey
    Feb 14, 2011 at 2:58 pm
    Mar 8, 2011 at 11:23 am
  • Hi, I am trying use lm() on some data, the code works fine but I would like to use a more efficient way to do this. The data looks like this (the data is very sparse with a few 1s, -1s and the rest ...
    Matthew DouglasMatthew Douglas
    Feb 28, 2011 at 8:32 pm
    Mar 4, 2011 at 6:22 pm
  • R-helpers: I would like to measure the correlation coefficient between the repeated measures of a single variable that is measured over time and is unbalanced. As an example, consider the Orthodont ...
    Brant InmanBrant Inman
    Feb 28, 2011 at 12:07 am
    Feb 28, 2011 at 11:44 pm
  • Hello! s<-"start"; e<-"end" middle<-as.character(c(1,2,3)) I would like to get the following result: "start 123 end" or "start 1 2 3 end" or "start 1,2,3 end" How can I avoide this (undesired) ...
    Dimitri LiakhovitskiDimitri Liakhovitski
    Feb 25, 2011 at 10:21 pm
    Feb 26, 2011 at 7:41 pm
  • How can I dynamically use a variable as the name for another variable? I realize this sounds cryptic, so an example is best: #Start with an array of "codes" codes <- c("a1", "b24", "q99") #Each code ...
    Noah SilvermanNoah Silverman
    Feb 25, 2011 at 6:55 am
    Feb 25, 2011 at 10:26 pm
  • Hello all, This shouldn't be difficult, but I am not able to extract a printed value from a function and assign it to an object. In my case, [1] 0.298 I would like to assign this result to an ...
    Duarte VianaDuarte Viana
    Feb 24, 2011 at 11:26 am
    Feb 24, 2011 at 5:58 pm
  • Hi i am doing an environmental research The equation is as follow: gam(y1 ~ x1 + s(x2) + s(x3) + s(x4), family = gaussian, fit = true) I would like to obtain the beta coefficient and 95CI of x4 (or ...
    ClcClc
    Feb 23, 2011 at 4:34 am
    Feb 24, 2011 at 2:36 am
  • Hi I want to have a rectangular plot of size 0.5*0.3 inches. I am having surprisingly a difficult time to do it... Since I will export it, I use also pdf(). The plot works fine, but once I specify ...
    Matthieu StiglerMatthieu Stigler
    Feb 22, 2011 at 12:53 pm
    Feb 23, 2011 at 4:39 pm
  • ls is a list of character vectors created by strsplit() I want to concatenate the 1st 4 character elements of each list item as a new vector called file. I admit to being confused about list syntax ...
    Robert BaerRobert Baer
    Feb 20, 2011 at 4:13 pm
    Feb 20, 2011 at 6:39 pm
  • Hello all, Before getting to my question, I would like to apologize for asking this question here. My question is not directly an R question, however, I still find the topic relevant to R community ...
    Tal GaliliTal Galili
    Feb 11, 2011 at 6:26 am
    Feb 19, 2011 at 2:38 pm
  • I get: svm data(iris) svm attach(iris) svm ## classification mode svm # default with factor response: svm model <- svm(Species ~ ., data = iris) svm # alternatively the traditional interface: svm x ...
    Juergen RoseJuergen Rose
    Feb 18, 2011 at 7:16 pm
    Feb 19, 2011 at 9:24 am
  • I'm attempting to sort a 3 dimensional array that looks like this , , 1 [,1] [,2] [1,] 9 9 [2,] 7 9 , , 2 [,1] [,2] [1,] 6 5 [2,] 4 6 , , 3 [,1] [,2] [1,] 2 1 [2,] 3 2 Such that it ends up like ...
    Maas James Dr (MED)Maas James Dr (MED)
    Feb 18, 2011 at 1:01 pm
    Feb 18, 2011 at 4:55 pm
  • i am trying to fit a linear model with both continuous covariates and factors. When fitted with the intercept term the first level of the factor is treated by R as intercept and the estimate of the ...
    ATANUATANU
    Feb 11, 2011 at 7:05 pm
    Feb 12, 2011 at 9:19 pm
  • I am interested in testing two similar nls models to determine if the lines are statistically different when fitted with two different data sets; one corn, another soybean. I know I can do this in ...
    Anthony Lawrence Nguy-RobertsonAnthony Lawrence Nguy-Robertson
    Feb 8, 2011 at 9:12 pm
    Feb 9, 2011 at 8:53 pm
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