A set of predicates and assertions for checking the properties of dates and times. Most of the documentation is on the assertive page. End-users will usually want to use assertive directly.
To install the stable version, type:
To install the development version, you first need the devtools package.
Then you can install the assertive.datetimes package using
is_date_string checks character vectors to see if they contain dates and times.
is_after check whether
POSIXt objects are before or after some time.
is_in_future are like the above, compared to the present time.
All predicates return a vector and have two corresponding assertions. For example,