mlr3misc (version 0.8.0)

check_packages_installed: Check that packages are installed, without loading them

Description

Calls find.package() to check if the all packages are installed.

Usage

check_packages_installed(
  pkgs,
  warn = TRUE,
  msg = "The following packages are required but not installed: %s"
)

Arguments

pkgs

(character()) Packages to check.

warn

(logical(1)) If TRUE, signals a warning of class "packageNotFoundWarning" about the missing packages.

msg

(character(1)) Format of the warning message. Use "%s" as placeholder for the list of packages.

Value

(logical()) named with package names. TRUE if the respective package is installed, FALSE otherwise.

Examples

# NOT RUN {
check_packages_installed(c("mlr3misc", "foobar"), warn = FALSE)

# catch warning
tryCatch(check_packages_installed(c("mlr3misc", "foobaaar")),
  packageNotFoundWarning = function(w) as.character(w))
# }