load_packages {hgutils}

Load and install packages

Description

Utility function to load and optionally install packages if they are missing. When the function terminates, packages are installed (if necessary) and loaded. Upgradeable packages are shown.

Usage

load_packages(
  ...,
  install_packages = TRUE,
  force_install = FALSE,
  show_outdated_packages = FALSE,
  default_loading_method = FALSE,
  return_library_statements = FALSE
)

Arguments

...

list of package names.

install_packages

whether to install the selected packages.

force_install

whether to install packages even if they are installed already.

show_outdated_packages

whether to show a list of packages which are outdated.

default_loading_method

load according to the default R method using only library()

return_library_statements

makes this function only return a string containing library() statements which can be paste into an R script.

Details

load_packages optionally installs, upgrades and attaches packages to the work space for a list of specified packages.

Value

Returns invisibly a list with additional package information and results of installing/upgrading and loading.

See Also

install.packages for installation of new packages, update.packages for updating outdated packages, library for load and attaching packages.

Other developer functions: crossref_description(), generic_implementations(), update_settings(), valid_pkgname()

Examples

## Not run: 
# Package names given one-by-one or in a vector
load_packages(c('magrittr', 'dplyr'))
load_packages('magrittr', 'dplyr')

# Package names may be unquoted
load_packages(magrittr, dplyr)
load_packages('magrittr','dplyr', install_packages=FALSE)

## End(Not run)