init_calendar.RdInitialise calendar.
init_calendar(n, v = 0, cal_length = getOption("ava")[["cal_length"]])character, row names of calendar
data values to be passed in calendar. See matrix() for format
Default to 0.
numeric, number of weeks in calendar. Default to
getOption("ava")[["cal_length"]].
matrix of n rows, cal_length (weeks) columns and with v values