yearmonth {tsibble}

Represent year-month

Description

Create or coerce using yearmonth().

Usage

yearmonth(x, ...)

make_yearmonth(year = 1970L, month = 1L)

## S3 method for class 'character'
yearmonth(x, format = NULL, ...)

is_yearmonth(x)

Arguments

x

Other object.

...

Further arguments to methods.

year, month

A vector of numerics give years and months.

format

A vector of strings to specify additional formats of x (e.g. ⁠%Y%m⁠), if a warning or an error occurs.

Value

year-month (yearmonth) objects.

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_yearmonth and others for ggplot2 scales

Other index functions: yearquarter(), yearweek()

Examples

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

# parse characters
yearmonth(c("2018 Jan", "2018-01", "2018 January"))

# seq() and arithmetic
mth <- yearmonth("2017-11")
seq(mth, length.out = 10, by = 1) # by 1 month
mth + 0:9

# display formats
format(mth, format = "%y %m")

# units since 1970 Jan
as.double(yearmonth("1969 Jan") + 0:24)

make_yearmonth(year = 2021, month = 10:11)
make_yearmonth(year = 2020:2021, month = 10:11)