isPackageLoaded: Checks if a package is loaded or not
Description
Checks if a package is loaded or not.
Note that, contrary to require()
,
this function does not load the package if not loaded.Usage
## S3 method for class 'default':
isPackageLoaded(package, version=NULL, ...)
Arguments
package
The name of the package.
version
A character
string specifying the version to test for.
If NULL
, any version is tested for.