make_dy: Calculate an SDTM -DY value from a date and a reference date

In billdenney/Rsdtm: Study Data Tabulation Model (SDTM) import, export, and management assistance

Calculate an SDTM –DY value from a date and a reference date

Description

Calculate an SDTM –DY value from a date and a reference date

Usage

make_dy(dates, refdt)

Arguments

dates	The dates for calculation
refdt	The dates for reference

Details

dates and refdt is passed through dateany_to_date() to ensure that they are R Date class objects.

Value

An integer vector with days since the reference date according to SDTM calculation rules: If dates < refdt, the difference in days; if dates >= refdt, the difference in days plus one.

See Also

Other Date management and conversion: dateany_to_date(), generate_dtc(), is_ISO8601_calendar_date(), is_ISO8601_calendar_datetime(), is_ISO8601_ordinal_datetime(), is_ISO8601_time(), is_ISO8601_timezone(), is_ISO8601_week_datetime(), pattern_ISO8601_any_date(), pattern_ISO8601_any_datetime(), pattern_ISO8601_calendar_date(), pattern_ISO8601_calendar_datetime(), pattern_ISO8601_calendar_year(), pattern_ISO8601_ordinal_date(), pattern_ISO8601_ordinal_datetime(), pattern_ISO8601_time(), pattern_ISO8601_timezone(), pattern_ISO8601_week_date(), pattern_ISO8601_week_datetime(), sdtm_dtc_to_datetime(), sdtm_first_dose(), sdtm_time_actual()

Examples

make_dy(c("2022-01-02", "2022-01-03", "2022-01-04"), "2022-01-03")

billdenney/Rsdtm documentation built on Feb. 17, 2025, 8:32 a.m.