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This is a year-day method for the calendar_count_between() generic. It counts the number of precision units between start and end (i.e., the number of years).


# S3 method for clock_year_day
calendar_count_between(start, end, precision, ..., n = 1L)


start, end


A pair of year-day vectors. These will be recycled to their common size.



One of:

  • "year"


These dots are for future extensions and must be empty.


[positive integer(1)]

A single positive integer specifying a multiple of precision to use.


An integer representing the number of precision units between start and end.


# Compute an individual's age in years
x <- year_day(2001, 100)
y <- year_day(2021, c(99, 101))

calendar_count_between(x, y, "year")
#> [1] 19 20

# Or in a whole number multiple of years
calendar_count_between(x, y, "year", n = 3)
#> [1] 6 6