Grokbase Groups R r-help January 2010

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919 discussions - 3,153 posts

  • Hi, I understand from help pages that in order to use a data set with svm, I have to divide it into two files: one for the dataset without the class label and the other file contains the class label ...
    Amy HessenAmy Hessen
    Jan 6, 2010 at 12:01 am
    Mar 5, 2010 at 7:55 am
  • This is sort of a strange bug. Not show stopping, but annoying. I was wondering if anyone else has noticed this and reported it before I submit a bug report. I noticed while running the RGui and ...
    John SchexnayderJohn Schexnayder
    Jan 6, 2010 at 11:51 pm
    Jan 22, 2010 at 3:21 pm
  • hello every one, How to function more than one loop in R? I have the following problem to be solved with the a method of three loops, can you help me please? The data is attached with this message ...
    Jan 17, 2010 at 12:09 am
    Feb 2, 2010 at 9:42 pm
  • Hello there, I want to create a string from strings and numbers, here is my code: str <- "name" & toString(20) but it returns me this error: Error in toString(20) : could not find function ".jcall" ...
    Jan 26, 2010 at 2:09 pm
    Feb 2, 2010 at 8:47 pm
  • Given vector of numbers x, I wish to select an n-subset with sum closest to fixed value s. Can anyone advise me how to approach this, in R? I have considered Rcplex package, which handles ...
    Dimitri ShvorobDimitri Shvorob
    Jan 30, 2010 at 12:15 am
    Feb 2, 2010 at 12:07 pm
  • Hi R People: I'm teaching a statistical computing class using R starting next week (yay!) and I have an opinion type question, please. I'm old school and use "<-" in an assignment. However, I'm ...
    Erin HodgessErin Hodgess
    Jan 15, 2010 at 3:45 am
    Jan 18, 2010 at 7:06 pm
  • Dear all, do you know if there is any particular version of R to implement with windows 64 bit, in such a way to increase the amount of memory it can use? How should I increase the memory, and more ...
    Alessia matanoAlessia matano
    Jan 11, 2010 at 4:29 pm
    Jan 12, 2012 at 4:14 pm
  • Hello, I have a matrix mat1 of dim [1,8] and mat2 of dim[30,8], I want to replace the first row of mat2 with mat1, this is what I do: mat2[1,]<-mat1 but it transforms mat2 in a list I don't ...
    Jan 29, 2010 at 8:55 pm
    Feb 1, 2010 at 3:54 pm
  • Hello, I am running R on cygwin for windows. File R1234 contains data <- read.table("data") q() On the command line I type R --no-save -q R_PROFILE=R1234 returns Error: could not find function ...
    Saleem mukhtarSaleem mukhtar
    Jan 15, 2010 at 8:33 pm
    Jan 27, 2010 at 2:02 am
  • Hi All, I was wodering if it is possible to increase the precision using R. I ran the script below in R and MAPLE and I got different results when k is large. Any idea how to fix this problem? thanks ...
    Jan 19, 2010 at 4:43 pm
    Jan 25, 2010 at 7:18 pm
  • Six times a year labs submit individual Excel spreadsheets to me. There are usually around 60 labs and the spreadsheets have 12 columns with 20 rows. Chapter 8 of the R Data Import/Export manual ...
    Jerry FlorenJerry Floren
    Jan 20, 2010 at 7:57 pm
    Jan 21, 2010 at 4:26 pm
  • Sorry to repeat the meassage, not sure if the HTML version has been received - Apologies for duplication Dear list I am trying to count the no of occurances in a column of a data frame and there is ...
    Steve SidneySteve Sidney
    Jan 17, 2010 at 10:31 am
    Jan 19, 2010 at 9:09 am
  • Dear R-experts, this is not a direct R-problem but I hope you can help me anyway. I would like to minimize || PG-I || over P, where P is a p x p permutation matrix (obtained by permuting the rows ...
    Jan 15, 2010 at 2:53 pm
    Jan 17, 2010 at 9:31 pm
  • Hi all I want to apply different colors on a simple plot: If I type par(br="gray") before a plot it puts all the image in gray but (imagine I run a simple plot) want to let the centrall box (where ...
    Jose Narillos de SantosJose Narillos de Santos
    Jan 26, 2010 at 2:44 pm
    Feb 1, 2010 at 10:04 pm
  • Hello, See my problem below. a<-data.frame(c("s","c","c","n","n","n"),c(rep(1,3),rep(2,3)),c(rep(2,3),rep(1,3)),c("01/01/1999","10/02/2000","13/02/2000","11/02/2000","15/02/2000","23/02/2000")) ...
    Jan 18, 2010 at 6:40 pm
    Jan 20, 2010 at 4:58 pm
  • Dear list, Many people seem unhappy with the new documentation server because you need to have R running to access it, and it's not immediately obvious how to bookmark references so they work ...
    Hadley WickhamHadley Wickham
    Jan 8, 2010 at 1:15 pm
    Jan 14, 2010 at 8:23 pm
  • hello could you give me a hint to convert data in factor type to numeric (float) ? regards -- Open WebMail Project ( -- This message has been scanned for viruses and dangerous ...
    Ahmet TemizAhmet Temiz
    Jan 13, 2010 at 9:47 am
    Oct 18, 2010 at 8:33 am
  • I have two data frames. One (arr) has all arrivals to an airport for a year, and the other (gw) has the dates and quarter hour of the day when the weather is good. arr has a Date and quarter hour ...
    James RomeJames Rome
    Jan 16, 2010 at 9:14 pm
    Jan 18, 2010 at 3:00 pm
  • Hi, I am hoping someone can help me with a sampling question. I am using the following function to sample 10 unique observations: x <- sample(1:100, 10, replace=F) Given the first 10 observations, I ...
    Jan 12, 2010 at 12:58 pm
    Jan 15, 2010 at 8:27 pm
  • Hi everybody, To run some statistical tests from the package WRS (from Rand R Wilcox), I need to store my data in a list, which fac2list() from this package does very well. But I would like to do it ...
    Ivan CalandraIvan Calandra
    Jan 29, 2010 at 4:39 pm
    Feb 3, 2010 at 1:28 pm
  • Hallo I'm having trouble figuring out how to evaluate an expression when one of the variables in the expression is defined separately as a sub expression. Here's a simplified example mat <- ...
    Jennifer YoungJennifer Young
    Jan 29, 2010 at 4:51 pm
    Feb 1, 2010 at 1:30 am
  • Hi everybody, I'm trying to set the number of decimals (i.e. the number of digits after the "."). I looked into options but I can only set the total number of digits, with options(digits=6). But ...
    Ivan CalandraIvan Calandra
    Jan 28, 2010 at 8:50 am
    Jan 29, 2010 at 9:08 am
  • I have a table (contact) with several fields and it's PK is an auto increment field. I'm bulk loading data to this table from files which if successful will be about 3.5million rows (approx 16000 ...
    Nathan S. Watson-HaighNathan S. Watson-Haigh
    Jan 27, 2010 at 6:32 am
    Jan 28, 2010 at 7:38 pm
  • Dear All, I would like to to group the Ticker by Industry and create file names from the Industry Factor and export to a txt file. I have tried the folowing ind=finvizAllexETF$Industry ind is then ...
    Peter RotePeter Rote
    Jan 20, 2010 at 8:38 am
    Jan 26, 2010 at 10:46 am
  • I am not able to import zipped files from the following link. How to get thw same in to R?. mydata <- read.csv("")
    Velappan PeriasamyVelappan Periasamy
    Jan 19, 2010 at 6:27 am
    Jan 25, 2010 at 12:29 am
  • I have a function that fits polynomial models for the orders in n: lmn <- function(d,n){ models=list() for(i in n){ models[[i]]=lm(y~poly(x,i),data=d) } return(models) } My data is: 1 2 3 4 5 6 7 8 ...
    Barry RowlingsonBarry Rowlingson
    Jan 18, 2010 at 11:31 pm
    Jan 19, 2010 at 7:02 pm
  • Hi everybody! I'm working on R today so I have a lot of questions (you may have noticed that it's the 3rd email today). I'm new on R, so please excuse the "spam"! I have a dataset "ssfa" with many ...
    Ivan CalandraIvan Calandra
    Jan 18, 2010 at 2:53 pm
    Jan 19, 2010 at 9:36 am
  • Dear all, I just installed the new version of R, 2.10.1, and I am currently using the package sparseM. (I also use a 64 bit windows version) I got a problem that I never had: when I try to multiply ...
    Alessia matanoAlessia matano
    Jan 11, 2010 at 11:30 am
    Jan 12, 2010 at 5:34 pm
  • I have encountered a strange behaviour of as.integer() which does not seem correct to me. Sorry if this is just an indication of me not understanding floating point arithmetic. [1] 29 So far, so ...
    Ulrich KellerUlrich Keller
    Jan 7, 2010 at 12:31 pm
    Jan 11, 2010 at 4:08 pm
  • Hello useRs, I'd like to perform a moving average on the dataset, xx. I've tried combining the functions Reduce and rollmean but it didn't work. Error in f(init, x[[i]]) : unused argument(s) (x[[i]]) ...
    Muhammad RahizMuhammad Rahiz
    Jan 2, 2010 at 2:26 pm
    Jan 7, 2010 at 6:25 pm
  • read.table terminates the program if the input file is empty. Is there way to let the program continue and return me a NULL instead of terminating the program? $ Rscript read_empty.R Error in ...
    Peng YuPeng Yu
    Jan 1, 2010 at 8:41 pm
    Jan 1, 2010 at 10:35 pm
  • Hi all, I am using RODB to export multiple data.frames into one excel file with multiple sheets. One thing I can't seem to unserdatand is way the command adds the character: ' To the beginning of ...
    Tal GaliliTal Galili
    Jan 18, 2010 at 10:38 am
    Mar 29, 2012 at 8:23 am
  • Hi, I am pretty new to R. I'm trying run a regression repeatedly, adding a new data point each time, and then storing the predicted Y values. For example, let's say I have 500 data points and I run ...
    Jan 30, 2010 at 11:14 pm
    Feb 2, 2010 at 10:09 pm
  • Has there been any update on R's handling large integers greater than 10^9 (between 10^9 and 4x10^9) ? as.integer() in R 2.9.2 lists this as a restriction but doesnt list the actual limit or cause, ...
    Blanford, GlennBlanford, Glenn
    Jan 26, 2010 at 8:25 pm
    Jan 29, 2010 at 12:27 am
  • Hi All, My R installation is acting strangely and I'm hoping somebody might have an idea what's going on: I can't seem to load the "RMySQL" function. It seems to have installed without a problem, but ...
    Jan 26, 2010 at 9:54 pm
    Jan 27, 2010 at 12:20 pm
  • Hello dear R help group, I learned recently that one can change the rotation of labels in the axis, when using a lattice plot, for example: library(lattice) barchart(yield ~ variety , data = barley, ...
    Tal GaliliTal Galili
    Jan 22, 2010 at 8:26 pm
    Jan 24, 2010 at 12:16 am
  • Hello everyone, I am using the na.omit() function on a 785 x 79 matrix. When I restrict the matrix to 10 columns for example it returns me the right result with the na rows deleted: 756 x 10 matrix ...
    Jan 21, 2010 at 11:01 pm
    Jan 22, 2010 at 3:05 pm
  • Hello, does anyone know how to take the mean for a subset of observations? For example, suppose my data looks like this: OBS NAME SCORE 1 Tom 92 2 Tom 88 3 Tom 56 4 James 85 5 James 75 6 James 32 7 ...
    Geoffrey SmithGeoffrey Smith
    Jan 5, 2010 at 6:29 pm
    Jan 7, 2010 at 8:16 pm
  • Hello, I'm trying to permute a vector of positive integers 0 with the constraint that each element must be <= twice the element before it (i.e. for some vector x, x[i] <= 2*x[i-1]), assuming the ...
    Andrew RomingerAndrew Rominger
    Jan 28, 2010 at 3:23 am
    Feb 1, 2010 at 8:07 pm
  • Hello all, I'm trying to create a 2x2 matrix, 32 times after unlist() so that I can convert the list to matrix. I've looked through the R archive but couldn't find the answer. There is what I've ...
    Muhammad RahizMuhammad Rahiz
    Jan 29, 2010 at 2:30 pm
    Feb 1, 2010 at 3:49 pm
  • Hello R buddies, I want to apply a function on an array but for each element of the array I want to use a different parameter, So here is how I tried to enter the function: apply(as.matrix(X),2, ...
    Jan 26, 2010 at 7:47 pm
    Jan 27, 2010 at 8:21 am
  • Hello, I'm new to R and I'm writing a function to read binary tables (the binary version of read.table essentially). I'm having trouble figuring out how to determine when I reach end-of-file. Can ...
    Jan 24, 2010 at 2:40 am
    Jan 24, 2010 at 7:56 pm
  • may some one please help me to sort this out, i am trying to writ a R code for calculating the frequencies of the amino acids in 9 different sequences, i want the code to read the sequence from ...
    Jan 2, 2010 at 4:59 am
    Jan 3, 2010 at 7:59 am
  • I´ve several packages for latent class analysis, but I was wondering if there is a package for continuos variables, which allows latent prfile analysis. Thanks for your help in advance, J Toledo ...
    Jon ToledoJon Toledo
    Jan 15, 2010 at 10:08 am
    Sep 4, 2012 at 8:01 pm
  • Dear all, I am looking at the R-help entry below: I have a more complicatedt problem. I have a zoo time series frame with 100+ sequences. I ...
    Jan 28, 2010 at 12:10 pm
    Feb 1, 2010 at 1:52 pm
  • Hi All, I'm conducting a meta-analysis and have taken a data.frame with multiple rows per study (for each effect size) and performed a weighted average of effect size for each study. This results in ...
    AC Del ReAC Del Re
    Jan 28, 2010 at 3:34 am
    Jan 29, 2010 at 7:30 pm
  • I have a challenge that I want to share with the group. This is not homework (but I may assign it as such if I teach the appropriate class again) and I have found one solution, so don't need anything ...
    Greg SnowGreg Snow
    Jan 12, 2010 at 6:33 pm
    Jan 28, 2010 at 9:47 pm
  • Hello, I have encountered problems using odfdWeave. I actually have the same error message as was reported in this message (, but I don't ...
    Jan 6, 2010 at 5:41 pm
    Jan 27, 2010 at 3:23 pm
  • Dear all, I've been using R on a Mac to process some data for export to ArcMap GIS (which only runs on Windows). ArcMap seems to require tab-delimited data (my data are in 3 columns), so I've been ...
    Steve MurraySteve Murray
    Jan 25, 2010 at 5:54 pm
    Jan 26, 2010 at 2:36 pm
  • Hi I'm hoping someone can help me I am a relative newbie to R. I have data that is in a similar format to this... Experiment Score1 Score2 X -0.85 -0.02 X -1.21 -0.02 X 1.05 0.09 Y -1.12 -0.07 Y ...
    Jan 20, 2010 at 4:07 pm
    Jan 22, 2010 at 4:02 pm
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791 users for January 2010

David Winsemius: 168 posts Gabor Grothendieck: 105 posts Duncan Murdoch: 77 posts Peter Ehlers: 71 posts Jim Holtman: 65 posts Henrique Dallazuanna: 63 posts Dieter Menne: 57 posts Uwe Ligges: 53 posts Jim Lemon: 49 posts Anna: 37 posts Dennis Murphy: 36 posts Bert Gunter: 26 posts Greg Snow: 26 posts Tal Galili: 26 posts Ivan Calandra: 25 posts Barry Rowlingson: 24 posts Dimitri Shvorob: 24 posts Milton ruser: 22 posts Petr PIKAL: 22 posts Turner Rolf: 22 posts
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