Check the Availability of a Package
Details
needs()
is designed for use inside other functions in your own package
to check for the availability of a suggested package.
If the required packages are not available and R is running interactively, the user will be asked to install the packages.
See also
Other validation methods:
check-attribute
,
check-data
,
check-matrix
,
check-numeric-comparison
,
check-numeric-trend
,
check-numeric
,
check-type
,
validate()