Set Nice Startup Options — set_startup_options • rprofile.setup

Sets nicer options. All arguments are passed to the options function. This function also sets ipck = TRUE in rc.settings.

set_startup_options(
  digits = 4L,
  show.signif.stars = FALSE,
  useFancyQuotes = FALSE,
  width = cli::console_width(),
  Ncpus = max(1L, parallel::detectCores() - 1L),
  continue = " ",
  max.print = 100L,
  servr.daemon = TRUE,
  max = 10L,
  mc.cores = max(1L, parallel::detectCores() - 1L),
  warnPartialMatchArgs = TRUE,
  warnPartialMatchDollar = TRUE,
  warnPartialMatchAttr = TRUE,
  scipen = 999L,
  HTTPUserAgent = sprintf("R/%s R (%s)", getRversion(), paste(getRversion(),
    R.version$platform, R.version$arch, R.version$os)),
  download.file.extra = sprintf("--header \"User-Agent: R (%s)\"",
    paste(getRversion(), R.version$platform, R.version$arch, R.version$os)),
  setWidthOnResize = TRUE,
  show.error.locations = TRUE,
  check.bounds = FALSE,
  menu.graphics = FALSE,
  error = "rlang",
  ...
)

Arguments

digits: Default 4
show.signif.stars: Default FALSE
useFancyQuotes: Default FALSE
width: Default cli::console_width() + 13L. See details.
Ncpus: Default number of CPUs - 1. Used for parallel pkg installs.
continue: Default blank space (remove the default +)
max.print: Default 100 to avoid blow up
servr.daemon: Default TRUE. For xaringan presentations
max: Default 10. For List printing
mc.cores: Default number of CPUs - 1. Used for parallel computing
warnPartialMatchArgs, warnPartialMatchAttr, warnPartialMatchDollar: Default TRUE. Warn if using partial arguments.
scipen: Default 999. Always print out full numbers, i.e. not 1e2
HTTPUserAgent: Used by RStudio Package Manager (RSPM).
download.file.extra: Used by RSPM for curl/wget installs, e.g. Rscript.
setWidthOnResize: If set and TRUE, R run in a terminal using a recent readline library will set the width option when the terminal is resized.
show.error.locations: Show error locations for sourcing
check.bounds: logical, defaulting to FALSE. If true, a warning is produced whenever a vector (atomic or list) is extended, by something like x <- 1:3; x[5] <- 6.
menu.graphics: Default FALSE. Logical: should graphical menus be used if available?
error: Default rlang. If rlang is installed, then error = rlang::entrace.
...: Other arguments passed to options.

Details

The width is only used in an R terminal (not RStudio). However, fancy prompts that involve colours (such as grey), mean that the column count is off as grey is grey()(cli::symbol$pointer) is translated to a 17 character Unicode string. My slightly hacky solution is to add a line break in the prompt, than add an additional 17 characters to the width to pad out the width.