Extract the entry time, exit time, status or duration of follow-up from a
Lexis object. Classify states.
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 )
transient( x )
absorbing( x )
preceding( x, states )
before( x, states )
succeeding( x, states )
after( x, states )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)names attribute.
string indicating the time point(s) at which status is to be measured. Possible values are "exit" or "entry".
Character vector of states.
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, a matrix is
returned.
The status function returns a vector giving the status at
"at" (entry or exit) and dur returns a vector with the
lengths of the follow-up intervals.
The functions transient and absorbing return character
vectors of the transient, resp. absorbing states. These are necessariy
disjoint but the union may not be the same as levels(x), since
the latter may have levels that are never assumed by either
lex.Cst or lex.Xst.
preceding returns a character vector with names of the states of the
Lexis object x from which one of the states in
states can be reached directly - the preceding
states. before is just a synonym for preceding.
succeeding returns a character vector with names of the states of the
Lexis object x that can be reached directly from one of the
states in states. after is just a synonym for succeeding.