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

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

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.

Details

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

See also

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