Date Utility Functions — dates • lossrx

A set of helper functions for dealing with dates in a typical actuarial analysis context.

Derive the number of months elapsed between two dates.

Usage

end_of_month(date)

start_of_month(date)

extract_date(string)

elapsed_months(end_date, start_date)

Arguments

date: character or date representation of a date.
string: string to extract a date from
end_date: end date
start_date: start date

Value

end_of_month returns last day of the month given.
start_of_month returns the first day of the month given.
extract_date returns a date object extracted from the provided string.

numeric

See also

as.Date(), lubridate::ceiling_date(), lubridate::floor_date(), flipTime::AsDate()

Examples

# character input
start_of_month("2020-08-13")
#> [1] "2020-08-01"
end_of_month("2017-10-20")
#> [1] "2017-10-31"

# can handle human-readable dates also
start_of_month("July 7, 1999")
#> [1] "1999-07-01"
end_of_month("February 5, 2019")
#> [1] "2019-02-28"

# date input
start_of_month(as.Date("2020-08-13"))
#> [1] "2020-08-01"
end_of_month(as.Date("2020-10-20"))
#> [1] "2020-10-31"