For a given time interval, each spell is cut so that it fully lies in the given time interval
cal.window(dat, window, surv = c("enter", "exit", "event", "birthdate"))
dat | Input data frame. Must contain survival data and a birth date. |
---|---|
window | Vector of length two; the time interval |
surv | Vector of length four giving the names of the central variables in 'dat'. |
A data frame of the same form as the input data frame, but 'cut' as
desired. Intervals exceeding window[2]
will be given event = 0
The window
must be in the order (begin, end)
Göran Broström
dat <- data.frame(enter = 0, exit = 5.731, event = 1, birthdate = 1962.505, x = 2) window <- c(1963, 1965) dat.trim <- cal.window(dat, window)