ISO yearweek to ISO year (character)

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

Usage

isoyearweek_to_isoyear_c(x)

# Default S3 method
isoyearweek_to_isoyear_c(x)

# S3 method for class 'character'
isoyearweek_to_isoyear_c(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 a character 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("cstime", package = "cstime") and vignette("date_conversion", package = "cstime"), which both run this function.

Other ISO yearweek-to-character converters: isoyearweek_to_isoquarter_c(), isoyearweek_to_isoweek_c(), isoyearweek_to_isoyearquarter_c()

Examples

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