ISO year to last ISO week (numeric)

Returns the number of the last ISO week in a given ISO year, that is, the count of ISO weeks in that year.

Usage

isoyear_to_last_isoweek_n(x)

# Default S3 method
isoyear_to_last_isoweek_n(x)

# S3 method for class 'character'
isoyear_to_last_isoweek_n(x)

# S3 method for class 'numeric'
isoyear_to_last_isoweek_n(x)

Arguments

x

ISO year as a number or character string, e.g. 2020 or "2020".

Value

Last ISO week of the year as an integer vector (52 or 53).

Details

This is 52 for most years and 53 for long ISO years such as 2020. The year is accepted as either a number or a character string.

See also

isoyear_to_last_isoyearweek_c() and isoyear_to_last_date() answer the same question as a yearweek string and as a date. vignette("date_conversion", package = "cstime") for worked date, ISO year and ISO week conversions. No vignette runs this function.

Examples

isoyear_to_last_isoweek_n(c(2019, 2020, 2021))
#> [1] 52 53 52
isoyear_to_last_isoweek_n("2020")
#> [1] 53