similar to: tcltk, tclRequire and Tktable help

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 <-

Hello, I have a problem with using Iwidgets in R while i'm able to use BWiget and Tktable. If I let tcl list the names of packages, Iwidgets seems available. I use R 2.6.0; in addition addTclPath("C:/Tcl/lib") has been used (in which iwidets is present) > try(tcl("package", "names")) <Tcl> http opt tcltest ::Utility::expand Widget ::Utility::number

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!

Why this kind of assignment does not work? n <- 1 f <- ifelse(n == 1, sin, cos) f(pi) this must be rewritten as: n <- 1 f <- cos if (n == 1) f <- sin f(pi) [oops. 1.224606e-16 instead of zero. Damn floating point errors :-/] Alberto Monteiro

Is there a simple way to plot a histogram with colors? For example, suppose I generate random points in the N(2,1) distribution: x <- rnorm(100000, mean = 2, sd = 1) Now I would like to plot the histogram: hist(x) but I would like to show the bars with x < 0 in red, and the bars with x >= 0 in lightgreen. Is there any simple way to do it? I think I can do it in two steps:

On Sun, May 3, 2020 at 6:15 PM Fox, John <jfox at mcmaster.ca> wrote: > > Dear R-devel list members, > > The Tktable package for Tcl/Tk is apparently missing from the Windows distribution of R 4.0.0. I (actually a user of the Rcmdr package) discovered this when trying to use the new-data-set dialog in the Rcmdr package, producing the error, "Tcl package 'Tktable'

This is just my curiousity working. Suppose I write: f1 <- function(x) x + 1 f2 <- function(x) 2 * f1(x) f2(10) # 22 f1 <- function(x) x - 1 f2(10) # 18 This is quite obvious. But is there any way to define f2 in such a way that we "freeze" the definition of f1? f1 <- function(x) x + 1 f2 <- function(x) # put something here 2 * f1(x) # probably put something else here

hi, i'm trying to make "Tabbed Notebook Widget",but cannot install "tclRequire(Iwidgets)". I installed Activetcl but I don't know what can be the next step to execute "tclRequire(Iwidgets)". how can i do that? Thanks -- View this message in context: http://r.789695.n4.nabble.com/How-to-install-tclRequire-Iwidgets-tp4502775p4502775.html Sent from the R help

Dear R-devel list members, The Tktable package for Tcl/Tk is apparently missing from the Windows distribution of R 4.0.0. I (actually a user of the Rcmdr package) discovered this when trying to use the new-data-set dialog in the Rcmdr package, producing the error, "Tcl package 'Tktable' must be installed first." I believe the Tktable has been part of the R distribution for

Another pathological test. arima does not crash for that series that crashes arma: arima(c(2.01, 2.22, 2.09, 2.17, 2.42), order=c(1,0,0)) However, arima crashes for this: arima(c(1.71, 1.78, 1.95, 1.59, 2.13), order=c(1,0,0)) arima seems pretty consistent in its crashing behaviour, since crashing for one series means crashing for all affine series: lets.crash.arima <- c(71, 78, 95, 59,

On Wed, 30 Jul 2003 TSudler at ch.imshealth.com wrote: <SNIP> table1 <- tkwidget(tt,"table",variable="tclArray", rows=as.character(dim(datifram)[1]+1), cols=as.character(dim(datifram)[2]),titlerows="1", titlecols="3",selectmode="extended",height="27",

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

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 have a conceptual problem (sort of). Maybe there's a simple solution, maybe not. First, let me explain the test case that goes ok. Let x be a (fixed) n-dimensional vector. I simulate a lot of linear models, y = m x + c + error, then I do a lot of regressions. As expected, the estimated values of m (let's call them m.bar) are distributed according to a Student's t distribution.

Is there any way that I can do something like this: png("file.png", width=200, height=200) polygon(c(50, 50, 150, 150), c(50, 150, 150, 50)) dev.off() and then have a png file with a 100 x 100 pixels rectangle in the middle of it? It seems that when I call "plot", it redefines the image coordinates to some "optimized" value and then I lose any information to

As a big fan of Wikipedia, it's frustrating to see how little there is about R in the correlated project, the Wikibooks: http://en.wikibooks.org/wiki/R_Programming Alberto Monteiro

Is there any way to write an imagematrix generated by the rimage package? Reproducible example: library(rimage) x <- read.jpeg(system.file("data", "cat.jpg", package="rimage")) png("newcat.png") plot(x) dev.off() The newcat.png image is different from the original file, because there are ugly white borders around it. Alberto Monteiro

This is probably very trivial - so I can't find an answer in the help files. When I have a series x (x[1], x[2], ... x[n]) and I want to construct a new series y (y[1], y[2], ... y[m]) such that y's are either interpolations of the x's (when m > n) or a weighted mean (when m < n), is there any direct function to do it? For example, passing from 3 to 4 would be the same as

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