Counting: iso-year-week-day

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

Usage

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

Arguments

start, end

[clock_iso_year_week_day]

A pair of iso-year-week-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 the number of whole ISO years between two dates
x <- iso_year_week_day(2001, 1, 2)
y <- iso_year_week_day(2021, 1, c(1, 3))
calendar_count_between(x, y, "year")
#> [1] 19 20