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Get the first date in an ISO week

Source: R/round_epiweek.R
floor_isoweek.Rd

Given any date from an ISO week ("isoweek") return the date of the first day of the isoweek (a Monday).

Usage

floor_isoweek(date)

Arguments

date

A date.

Value

The date that ends the epidemiological week, as a lubridate::date().

Examples

floor_isoweek(as.Date("2025-03-13")) # rounded to Monday
#> [1] "2025-03-10"
floor_isoweek(as.Date("2025-03-10")) # this is already Monday
#> [1] "2025-03-10"