yearweek {tsibble}

Represent year-week based on the ISO 8601 standard (with flexible start day)

Description

Create or coerce using yearweek().

Usage

yearweek(x, week_start = getOption("lubridate.week.start", 1))

make_yearweek(
  year = 1970L,
  week = 1L,
  week_start = getOption("lubridate.week.start", 1)
)

is_yearweek(x)

is_53weeks(year, week_start = getOption("lubridate.week.start", 1))

Arguments

x

Other object.

week_start

An integer between 1 (Monday) and 7 (Sunday) to specify the day on which week starts following ISO conventions. Default to 1 (Monday). Use options(lubridate.week.start = 7) to set this parameter globally.

year, week

A vector of numerics give years and weeks.

Value

year-week (yearweek) objects.

TRUE/FALSE if the year has 53 ISO weeks.

Display

Use format() to display yearweek, yearmonth, and yearquarter objects in required formats. Please see strptime() details for supported conversion specifications.

See Also

scale_x_yearweek and others for ggplot2 scales

Other index functions: yearmonth(), yearquarter()

Examples

# coerce POSIXct/Dates to yearweek
x <- seq(as.Date("2016-01-01"), as.Date("2016-12-31"), by = "1 week")
yearweek(x)
yearweek(x, week_start = 7)

# parse characters
yearweek(c("2018 W01", "2018 Wk01", "2018 Week 1"))

# seq() and arithmetic
wk1 <- yearweek("2017 W50")
wk2 <- yearweek("2018 W12")
seq(from = wk1, to = wk2, by = 2)
wk1 + 0:9

# display formats
format(c(wk1, wk2), format = "%V/%Y")

make_yearweek(year = 2021, week = 10:11)
make_yearweek(year = 2020:2021, week = 10:11)

is_53weeks(2015:2016)
is_53weeks(1969)
is_53weeks(1969, week_start = 7)