ISO yearweek to season week (numeric)

Maps an ISO yearweek to its position within the surveillance season, where season week 1 corresponds to ISO week 35.

Usage

isoyearweek_to_seasonweek_n(x)

Arguments

x

ISO yearweek as a character string of the form "yyyy-ww", e.g. "2021-01".

Value

Season week as a numeric vector.

Details

This function takes the ISO week from the yearweek string and converts it with isoweek_to_seasonweek_n(). The same season-week numbering applies, including the 18.5 half-step for ISO week 53.

See also

vignette("season", package = "cstime") for worked season week conversions. No vignette runs this function.

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

Examples

isoyearweek_to_seasonweek_n(c("2021-01", "2021-35"))
#> [1] 19  1