excursions (version 2.4.1)

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)

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.

Value

require.nowarnings returns (invisibly) a logical indicating whether the required package is available.

Details

require.nowarnings(package) acts the same as require(package, quietly = TRUE), except that all warnings are turned off. In particular, no warning is given if the package is unavailable.

See Also

require

Examples

# NOT RUN {
## This should produce no output:
if (require.nowarnings(nonexistent)) {
message("Package loaded successfully")
}
# }