Age cut of survival data
For a given age interval, each spell is cut to fit into the given age interval.
age.window(dat, window, surv = c("enter", "exit", "event"))dat |
Input data frame. Must contain survival data. |
window |
Vector of length two; the age interval. |
surv |
Vector of length three giving the names of the central variables in 'dat'. |
The window must be in the order (begin, end)
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.
If the selection gives an empty result, NULL is returned, with no warning.
Göran Broström
dat <- data.frame(enter = 0, exit = 5.731, event = 1, x = 2) window <- c(2, 5.3) dat.trim <- age.window(dat, window)
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