similar to: Bug in list indexing (PR#13411)

I?ve been using this routine for several years. I?m sorry, I don?t remember where I got it. It works as it should, viz. it blanks the R console. But it requires package rcom and now that requires rscproxy. cls <- function () { require(rcom) wsh <- comCreateObject("Wscript.Shell") comInvoke(wsh, "SendKeys", "\f") invisible(wsh) } > cls()

I am unable to install the rggobi package. I do not have trouble installing other packages. Any advice or suggestions? >sessionInfo() R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 attached base packages: [1] stats

Although I have installed R many times on many machines without problems, I have recently encountered a problem with accessing packages. R has been installed successfully with the "--internet2" option. The session info is below. > sessionInfo() R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_United States.1252;LC_CTYPE=English_United

Dear R-help, There seems to be a web page I am unable to download using RCurl. I don't understand why it won't download: > library(RCurl) > my.url <- "http://www.nytimes.com/2009/01/07/technology/business-computing/07program.html?_r=2" > getURL(my.url) [1] "" Other web pages are ok to download but this is the first time I have been unable to download a

Hi List, I have a problem with using Latex and Sweave for creating a document. So I downloaded the Sweave manual from http://www.statistik.lmu.de/~leisch/Sweave/Sweave-manual.pdf and i have tried to replicate the example on pages 4-5, but i encounter the following problem: IT DOES NOT WORK. I can run Sweave, create the .tex file and then when building the .tex file in TeXnikCenter i get all

Hi, I'm trying to make sense of the image3d plots in misc3d. Unfortunately I can't find any authors on the help pages of the function to e-mail directly. In the following toy example, I'm puzzled as to why (1) the positions of the image plot on the axes include negative values when I think I've specified all to be 1:3 and (2) the logic that needs to be adhered to in order to

Dear all, Objective: I am trying to learn about neural networks. I want to see if i can train an artificial neural network model to discriminate between spam and nonspam emails. Problem: I created my own model (example 1 below) and got an error of about 7.7%. I created the same model using the Rattle package (example 2 below, based on rattles log script) and got a much better error of about

Hello UseRs, I've just tried to load the lme4 package and got the error message, "function 'cholmod_l_start' not provided by package 'Matrix'". I downloaded the latest version of lme4 and its required packages (lattice and Matrix) as suggested in the archives and still got this message. The FAQ and archives suggested to check the R version requirements, but I'm

Sub and gsub treat \\ replacement pattern incorrectly I expect sub("a","\\", "a", perl=T) to produce [1] "\" instead it generates [1] "" On the other hand, if I run sub("a","\\\\", "a", perl=T) it correctly outputs [1] "\\" The same issue applies to gsub. --please do not edit the information

Hi, On my laptop, R is installed on windows XP SP2 at D:\Program Files\R\R-2.8.0, and all add-on packages are installed at D:\Program Files\R\R-2.8.0.libs. In addition, I have created two environment enviroment to ease upgrading and installation of packages. Packages installed is a mix of those from CRAN, Bioconductor and local zips. D:\My Document\My Desktop>echo %R_HOME% D:/Program

\b is word boundary. But, unexpectedly, strsplit("dia ma", "\\b") splits character by character. > strsplit("dia ma", "\\b") [[1]] [1] "d" "i" "a" " " "m" "a" > strsplit("dia ma", "\\b", perl=TRUE) [[1]] [1] "d" "i" "a" " "

Dear R-helpers: I created a folder containing R on a read-only CD and use it by having the R-icon, located on the Windows desktop, point to the CD (R-2.8.1\bin\Rgui.exe) for the "Target," and to a Windows Desktop folder for "Start in." This works nicely EXCEPT that the R help() function cannot display anything, and presents a screen message saying "This program cannot

I recently built R-devel on Windows XP (sessionInfo below), and when loading libraries that require the iconv.dll was getting an error stating that 'This application has failed to start because iconv.dll was not found. Re-installing the application may fix this problem.'. An R-2.8.1 that I installed using the Windows installer has this dll in R-2.8.1/bin, whereas in R-devel it is still in

Hi Group, I posted this question on the ggplot list and was advised to try here also. The code below produces a plot as a png and pdf. The pdf looks great, and I cannot make the png look this way. I've tried various combinations of height, width, and dpi, but it has not worked out so far. Any suggestions to make the png look like the pdf? I received a response that the problem does not occur

Hi all, I have problems reading Unicode (UTF-16) coded tables in R 2.8.1 under Windows Vista. Imagine the following table: a b c d X 1,2 1,3 1,4 Y 2,2 2,3 2,4 Z 3,2 3,3 3,4 Usually I would use the following code to read the table: t = read.table("test.txt", header=T, sep="\t",dec=",") This works well if I create the table

Hi: I am experiencing a problem with dataset diamonds in ggplot2. When trying execute the summary(diamonds) statement, the following error message is displayed: Error in summary(diamonds) : Cannot open file 'C:/Users/James/R_Pgms/R/R-2.8.1/library/ggplot2/data/Rdata.rdb': No such file or directory Can you please advise me? A complete history of commands leading up to this problem is

Hi, I am writing an Sweave document and am using 'xtable' to make frequency tables of diagnoses of people undergoing cholecystectomy. Some of these diagnoses contain Danish characters ("?", "?", and "?"), and these characters are all garbled in the Latex document after I run Sweave. The odd thing is, everything looks absolutely right in the R console, and if

Hi, I have an S4 class that inherits from "array" but does not add generic implementations of the "[" method. A simplified example is: setClass("fooarray", contains="array") If I create a "fooarray" object and subset it with a one-dimensional index vector, the return value is of class "fooarray". Other variants (see below), however,

Hello, > X <- data.frame(letters=letters[1:3], flag=c(TRUE, FALSE, TRUE)) > X letters flag 1 a TRUE 2 b FALSE 3 c TRUE > apply(X, 1, as.list) [[1]] [[1]]$letters [1] "a" [[1]]$flag [1] " TRUE" [[2]] [[2]]$letters [1] "b" [[2]]$flag [1] "FALSE" [[3]] [[3]]$letters [1] "c" [[3]]$flag [1] " TRUE"

Hi all, I was just radomly playing with R and got the following error when trying to filter a data frame using a string: > Angel <- c(7,8,6,9,10) > Buffy <- c(8,9,4,9,10) > Firefly <- c(9,9,10,10,10) > DrHorrible <- c(10,9,9,10,10) > my.df <- data.frame(Angel, Buffy, Firefly, DrHorrible) > my.df["DrHorrible"] DrHorrible 1 10 2 9 3