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BBmisc

requirePackages

Require some packages.

Description

Packages are loaded either via requireNamespace or require.

If some packages could not be loaded and stop is TRUE the following exception is thrown: “For <why> please install the following packages: <missing packages>”. If why is NULL the message is: “Please install the following packages: <missing packages>”.

Usage

requirePackages(packs, min.versions = NULL, why = "", stop = TRUE,
  suppress.warnings = FALSE, default.method = "attach")

Arguments

packs

[character]
Names of packages. If a package name is prefixed with “!”, it will be attached using require. If a package name is prefixed with “_”, its namespace will be loaded using requireNamespace. If there is no prefix, argument default.method determines how to deal with package loading.
min.versions

[character]
A char vector specifying required minimal version numbers for a subset of packages in packs. Must be named and all names must be in packs. The only exception is when packs is only a single string, then you are allowed to pass an unnamed version string here. Default is NULL, meaning no special version requirements
why

[character(1)]
Short string explaining why packages are required. Default is an empty string.
stop

[logical(1)]
Should an exception be thrown for missing packages? Default is TRUE.
suppress.warnings

[logical(1)]
Should warnings be supressed while requiring? Default is FALSE.
default.method

[character(1)]
If the packages are not explicitly prefixed with “!” or “_”, this arguments determines the default. Possible values are “attach” and “load”. Note that the default is “attach”, but this might/will change in a future version, so please make sure to always explicitly set this.

Value

[logical]. Named logical vector describing which packages could be loaded (with required version). Same length as packs.

Examples

requirePackages(c("BBmisc", "base"), why = "BBmisc example")
BBmisc

Miscellaneous Helper Functions for B. Bischl

v1.11
BSD_2_clause + file LICENSE
Authors
Bernd Bischl [aut, cre], Michel Lang [aut], Jakob Bossek [aut], Daniel Horn [aut], Jakob Richter [aut], Dirk Surmann [aut]
Initial release

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