This function figures out which rows are missing in either state and applies
the provided enter
and exit
functions to fill in the blanks and provide
a 1-to-1 relation between the rows in from
and to
.
.complete_states(from, to, id, enter, exit, max_id)
A list with the elements from
and to
holding the filled out
versions of from
and to
Data.frames to tween between
The name of the column that holds the matching id
functions to fill out missing rows in from
and to
respectively