Return position within a ti period, or a particular
day within the period.
dayOfPeriod(xTi = today(), tif = NULL)
dayOfWeek(xTi = today())
dayOfMonth(xTi = today())
dayOfYear(xTi = today())
firstDayOf(xTi)
lastDayOf(xTi)
firstBusinessDayOf(xTi)
lastBusinessDayOf(xTi)
firstBusinessDayOfMonth(xTi)
lastBusinessDayOfMonth(xTi)
currentMonthDay(xTi, daynum)
latestMonthDay(xTi, daynum)a ti object or something that the ti()
function can turn into a ti object
a time index frequency code or name. See tif.
day number in month
All of the functions except the dayOfXXXXX return ti
objects as described in the details section above. The
dayOfXXXXX functions return numbers.
The dayOfXXXXX functions all work the same way, returning the
day number of the XXXXX that jul(xTi) falls on. For example,
if today is Thursday, January 5, 2006, then dayOfWeek(),
dayOfMonth() and dayOfYear() are all 5. All of these
are implemented via dayOfPeriod, which converts its first
argument to a Julian date (via jul(xTi)) and finds the
ti with frequency tif that day falls into. It returns
the day number of the period represented by that time index that the
Julian date falls on.
firstDayOf and lastDayOf return a daily ti for
the first or last day of the period represented by xTi.
firstBusinessDayOf and lastBusinessDayOf do the same but
the returned ti has business daily frequency.
firstBusinessDayOfMonth returns a business daily ti for
the first business day of the month of xTi.
lastBusinessDayOfMonth does the same but for the last business
day of the month of xTi.
currentMonthDay returns a daily ti for the next upcoming
daynum'th of the month. latestMonthDay does the same
for the most recent daynum'th of the month.
currentMonday returns the daily ti for the last day of
the Monday-ending week that its argument falls into. The other
current{Weekday} functions work the same way.
ti, tif, jul,
holidays, nextBusinessDay,
previousBusinessDay