This is a living document. Everything in this document is made in good faith of being accurate, but like I just said; we don't yet know everything about what's going on.
Update: I've disabled comments as of 2025-01-26 to avoid everyone having notifications for something a year on if someone wants to suggest a correction. Folks are free to email to suggest corrections still, of course.
| ## Modify a vector in the workspace; x is a user-accessible symbol | |
| x <- 42 | |
| .Internal(inspect(x)) | |
| # @5631a3a19e20 14 REALSXP g0c1 [REF(5)] (len=1, tl=0) 42 | |
| x[1] <- 43 # modification causes a copy (address changes) | |
| .Internal(inspect(x)) | |
| # @5631a36c1cb8 14 REALSXP g0c1 [REF(4)] (len=1, tl=0) 43 | |
| ## Modify a vector inside a function; user cannot access y | |
| f <- function() { |
| pkgbase = rstudio-desktop-bin | |
| pkgdesc = An integrated development environment (IDE) for R (binary from RStudio official repository) | |
| pkgver = 2025.09.2.418 | |
| pkgrel = 2 | |
| url = https://posit.co/products/open-source/rstudio/ | |
| arch = x86_64 | |
| license = AGPL | |
| depends = r>=3.3.0 | |
| depends = ttf-dejavu | |
| provides = rstudio-desktop=2025.09.2.418 |
| #' Flatten copy | |
| #' | |
| #' @param from Source directory path. | |
| #' @param to Destination directory path. | |
| #' | |
| #' @return Destination directory path. | |
| #' | |
| #' @details | |
| #' Copy all `.Rmd`, `.qmd`, and `.md` files from source to destination, | |
| #' rename the `.qmd` and `.md` files with an additional `.Rmd` extension, |
| #### --------------------------------------------- | |
| ## Edit via: RStudio > Tools > Edit Code Snippets | |
| # Released under a MIT license | |
| snippet fragment | |
| [${1:text}]{.${2:type}} | |
| snippet aside | |
| [${1:text}]{.aside} | |
These are my installation-tricks and notes for running Linux on a 2021 Thinkpad
P14s Gen2 with AMD Ryzen 7 5850U. It should also be suitable for the Thinkpad T14 Gen2 AMD as they are technically the same modell.
Meanwhile there is also a good test on youtube and an entry in the arch-wiki, which also comments some points mentioned here.
R and Rmd features are handled by:
| #' Print xaringan slides to PDF | |
| #' | |
| #' Prints xaringan slides to a PDF file, even complicated slides | |
| #' with panelsets or other html widgets or advanced features. | |
| #' Requires a local installation of Chrome. | |
| #' | |
| #' @param input Path to Rmd or html file of xaringan slides. | |
| #' @param output_file The name of the output file. If using NULL then | |
| #' the output filename will be based on filename for the input file. | |
| #' If a filename is provided, a path to the output file can also be provided. |
write.csv(iris, "iris.csv")
read_csv_filtered <- function(file, ..., select_vars = NULL, chunk_size = 10) {
stopifnot(requireNamespace("dplyr", quietly = TRUE),
requireNamespace("readr", quietly = TRUE))
filter_by_id <- function(..., select_vars) {
function(.data, pos) {
if (!is.null(select_vars)) .data <- dplyr::select(.data, !!!select_vars)