cumulate() computes the cumulative incidence over time for an
<incidence2> object.
Examples
data.table::setDTthreads(2)
dat <- data.frame(
dates = as.integer(c(0,1,2,2,3,5,7)),
groups = factor(c(1, 2, 3, 3, 3, 3, 1))
)
i <- incidence(dat, date_index = "dates", groups = "groups")
cumulate(i)
#> # incidence: 6 x 4
#> # count vars: dates
#> # groups: groups
#> date_index groups count_variable cumulative_count
#> * <int> <fct> <chr> <int>
#> 1 0 1 dates 1
#> 2 7 1 dates 2
#> 3 1 2 dates 1
#> 4 2 3 dates 2
#> 5 3 3 dates 3
#> 6 5 3 dates 4