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).
Usage
# S3 method for clock_year_day
calendar_count_between(start, end, precision, ..., n = 1L)
Arguments
- start, end
[clock_year_day]
A pair of year-day vectors. These will be recycled to their common size.
- precision
[character(1)]
One of:
"year"
- ...
These dots are for future extensions and must be empty.
- n
[positive integer(1)]
A single positive integer specifying a multiple of
precision
to use.
Examples
# 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