excursions (version 2.5.8)

require.nowarnings: Warnings free loading of add-on packages

Description

Turn off all warnings for require(), to allow clean completion of examples that require unavailable Suggested packages.

Usage

require.nowarnings(package, lib.loc = NULL, character.only = FALSE)

Value

require.nowarnings returns (invisibly) TRUE if it succeeds, otherwise FALSE

Arguments

package

The name of a package, given as a character string.

lib.loc

a character vector describing the location of R library trees to search through, or NULL. The default value of NULL corresponds to all libraries currently known to .libPaths(). Non-existent library trees are silently ignored.

character.only

a logical indicating whether package can be assumed to be a character string.

Details

require(package) acts the same as require(package, quietly = TRUE) but with warnings turned off. In particular, no warning or error is given if the package is unavailable. Most cases should use requireNamespace(package, quietly = TRUE) instead, which doesn't produce warnings.

See Also

require

Examples

## This should produce no output:
if (require.nowarnings(nonexistent)) {
  message("Package loaded successfully")
}