ISO yearweek to ISO year (numeric)

Extracts the ISO year from an ISO yearweek string and returns it as a number.

Usage

isoyearweek_to_isoyear_n(x)

# Default S3 method
isoyearweek_to_isoyear_n(x)

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

Arguments

x

ISO yearweek as a character string of the form "yyyy-ww", e.g. "2020-19" for the 19th ISO week of 2020.

Value

ISO year as an integer vector (e.g. 2020).

Details

The input is split on the hyphen into year and week, and the year part is returned. The week part is ignored.

See also

vignette("date_conversion", package = "cstime"), which runs this function.

Other ISO yearweek-to-number converters: isoyearweek_to_isoquarter_n(), isoyearweek_to_isoweek_n(), isoyearweek_to_seasonweek_n()

Examples

isoyearweek_to_isoyear_n("2020-10")
#> [1] 2020