Experimental feature added:
When calling incidence() if users specify an integer(ish) interval on an (integerish) date input these inputs will be coerced in to grates_int_period objects. This fixes #121 and (broadly) restores earlier behaviour of the incidence() function. This functionality is subject to change and, for that reason, is not widely documented.
library(incidence2)
x <- data.frame(onset = c(1, 3, 4, 4, 3, 4, 10))
# 2.5.0 release would error, e.g.
incidence(x, "onset", interval = 1)
#> Error in as_period.default(): Not implemented for class [numeric].
# This release - now works
incidence(x, "onset", interval = 1)
#> # incidence: 4 x 3
#> # count vars: onset
#> date_index count_variable count
#> <intper> <chr> <int>
#> 1 1 onset 1
#> 2 3 onset 2
#> 3 4 onset 3
#> 4 10 onset 1