Counting: year-day

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 class '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.

Value

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

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