| start.Lexis {Epi} | R Documentation |
Extract the entry time, exit time, status, or duration of follow-up from a
Lexis object.
entry(x, time.scale = NULL)
exit(x, time.scale = NULL)
status(x, at=c("entry","exit"))
dur(x)
x |
an object of class Lexis. |
time.scale |
a string or integer indicating the time scale. If omitted, all times scales are used. |
at |
string indicating the time point(s) at which status is to be measured. |
The entry and exit functions return a matrix containing
the entry times and exit times, respectively, on the requested time
scales. The status function returns a dataframe with the status
at entry and/or exit and dur returns a vector with the lengths
of the follow-up intervals.
Martyn Plummer