This is an action function that does nothing when the corresponding milestone
is triggered. When the listener is monitoring a trial and determining the
time to trigger a milestone, data is automatically locked with other necessary
data manipulations (censoring, truncation, etc.) are executed.
If the users have no intent to modify the
trial adaptively at the milestone, e.g., adding (add_arms()) or
removing (remove_arms()) arm(s),
changing sampling ratio(s) (update_sample_ratio()),
modifying trial duration (set_duration()), carrying out statistical
testing, or saving intermediate results (save(), etc.),
then this function
can be used to set the argument action when creating a new milestone.
Note that the triggering time and number of observations/events of endpoints
at a milestone with action = doNothing is still recorded in output
automatically.
Arguments
- trial
an object returned from
trial().- ...
(optional) arguments. This is for capturing redundant arguments in
milestone()only.