The class Survr is an S4 that represents a formula response for
recurrent event data model. The function Survr produces
objects of this class. See ``Slots'' for details.
.DataA numeric matrix object.
IDA charactrer vector for original subject identificator.
checkA logical value indicating whether to performance data checking.
ordAn integer vector for increasingly ordering data by ID,
time, and 1 - event.
Survr