Extract the entry time, exit time, status or duration of follow-up from a
Lexis object.
entry(x, time.scale = NULL, by.id=FALSE)
exit(x, time.scale = NULL, by.id=FALSE)
status(x, at="exit" , by.id=FALSE)
dur(x, by.id=FALSE)an object of class Lexis.
a string or integer indicating the time scale. If omitted, all times scales are used.
Logical, if TRUE, only one record per unique value
of lex.id is returned; either the first, the last or for
dur, the sum of lex.dur. If TRUE, the returned
object have the lex.id as (row)nmes attribute.
string indicating the time point(s) at which status is to be measured.
The entry and exit functions return a vector of
entry times and exit times, respectively, on the requested time
scale. If multiple time scales are requested, then a matrix is
returned.
The status function returns a vector giving the status
at entry or exit and dur returns a vector with the lengths
of the follow-up intervals.