similar to: newbie upgrade from 2.4.0 to 2.4.1 question

Is there any way to run an R script without running R? As an example, suppose I have a tcl/tk interface that asks for a number (in a GUI) and displays its factorial. Is there a way to invoke this script without invoking R? I'm using R 2.4.1 in GNU/Linux Fedora Core 4. Alberto Monteiro

[I tried to send this messages two days ago, but I guess I mistyped the To: address...] Why "system" is different in Linux and Windows? Both in R 2.4.1, but in Windows there is an option: system(something, wait = FALSE) while on Linux (Fedora Core 4), there is no such option? Alberto Monteiro

Hi once again! Merry whatever doesn't offend you! I've taken the time to set up a clean automated build of Icecast for Windows. This is on the Open Build Service instance of the OpenSUSE folks. It is now building against a clean and up to date MinGW32 environment, maintained as part of openSUSE. This needed some fixes to our code to build properly. Erik van Pienbroek, of the Fedora

Is there any way to "force" 0 * NA to be 0 instead of NA? For example, suppose I have a vector with some valid values, while other values are NA. If I matrix-pre-multiply this by a weight row vector, whose weights that correspond to the NAs are zero, the outcome will still be NA: x <- c(1, NA, 1) wt <- c(2, 0, 1) wt %*% x # NA Alberto Monteiro

Is there any generic function that gets the "home" directory? This should return /home/<user> in Linux and x:/Documents and Settings/<user> (or whatever) in Windows XP. Another (unrelated) question: what is the _simplest_ way to read and write R variables to/from files such that they are stored in a human-readable but R-like form? For example, if (say), x is a vector

Is there any function to write a XML structure, after it was read using xmlTreeParse? Ex: library(XML) x <- xmlTreeParse("Irpf2008/aplicacao/dados/12345678901/12345678901.xml") # write it... Alberto Monteiro PS: please, brazilians, don't be offended by my foul language!

This must be a stupid question, but is there any "extension" of get? For example: x <- 10 get("x") # gives me 10 get("x^2") # gives me an error Alberto Monteiro

I have some questions about the RODBC package. library(RODBC) # required for those who want to repeat these lines 1st, I noticed that the following sequence does not work: channel <- odbcConnextExcel("test.xls") tables <- sqlTables(channel) name1 <- tables[1, "TABLE_NAME"] # this should be the name plan1 <- sqlFetch(channel, name1) # bang!

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 tkinter and tcl/tk, but nowhere I found anything remotely similar to a help. For example, what are the possible arguments to tkgetOpenFile? I know that this works: library(tcltk) filename <-

This is to announce the release of Icecast 2.4.1. This is a pure bugfix-only release. Upgrading to it is recommended, especially due to security fixes. A summary of the changes is listed below, for details please refer to the ChangeLog. Fixes * Fix autogen.sh to work properly on OS X * Removed threadpool from the example config (it is long gone and unused) * More detailed

This is to announce the release of Icecast 2.4.1. This is a pure bugfix-only release. Upgrading to it is recommended, especially due to security fixes. A summary of the changes is listed below, for details please refer to the ChangeLog. Fixes * Fix autogen.sh to work properly on OS X * Removed threadpool from the example config (it is long gone and unused) * More detailed

Suppose that I have a matrix like: m <- rbind(c(1,2,3,4), c(2,3,2,1)) Is there any way to efficiently plot the _lines_ as if I was doing: plot(m[1,], type="l") points(m[2,], type="l", col="red") (of course, in the "real world" there much more than just 2 lines and 4 columns...) Alberto Monteiro

I found a curious bug in read.xls. I don't know if it's reproducible. It's like this: suppose I do a read.xls in a spreadsheet. A column begins with a number. Then, any strings below it will be rendered as NA. If the column begins with a string, then it will be rendered correctly. Alberto Monteiro

I am trying to plot a small graphic inside the graphic area of a bigger graphic. Does anybody know the commend for that? Thanks a lot! -- MSc José Alberto F. Monteiro Botanisches Institut Universität Basel السلام عليكم [[alternative HTML version deleted]]

Is there a way to know where is the source, so as to make a source call inside another source smarter? As an example: file1.R is in directory /files/dir1/ file2.R is in directory /files/dir1/dir2/ In file1.R, there is this line: source("dir2/file2.R") So, if I setwd to /files/dir1/, and then I call source("file1.R"), it will run correctly. However, if I setwd to /files,

I think I - almost - got the knack for GUI programming using the tcltk library. Maybe I will update the RWiki with this: # ################################################# # library(tcltk) # # Create some matrix - nothing about tcltk here # matrix <- cbind(rnorm(100), rpois(100, lambda=10), runif(100), rt(100, df=2), rt(100, df=4)) colnames(matrix) <- c("Normal",

Ooops! Sorry, I send it only to Uwe Ligges the first time. Best, Philippe Grosjean This is perhaps another solution, more elegant in the way the block comment is written... but it requires to redefine `!` and slows it a little bit because it tests first its arguments before calling .Primitive(!): It takes advantage of `!` being not defined for character arguments: > !2 [1] FALSE >

I mean, I can generate a expression, for example, with: z <- expression(x+y) But then how can I _use_ it? Is it possible to retrieve information from it, for example, that z is a sum, its first argument is x (or expression(x)) and its second argument is y? Alberto Monteiro

I want to make a plot, but instead of showing _numerical_ values, I would like to show _symbolic_ values. For example, I want to plot a function y = a x + b, where x varies between Xmin and Xmax. I would like the plot to show, in the x-axis, the strings Xmin and Xmax, instead of their numeric values. Is it possible? Alberto Monteiro

Why does as.numeric convert matrices and arrays to vectors? as.numeric(matrix(c("1", "2", "3", "4"), 2, 2)) [1] 1 2 3 4 I could only figure out ugly ways to bypass this, like: x <- matrix(c("1", "2", "3", "4"), 2, 2) array(as.numeric(x), dim = dim(x), dimnames = dimnames(x)) Alberto Monteiro