RA constructor for YearlyDate.

Usage:

obj = ra(year)

obj = ra(dateString)

dateObj = ra(datenumber);

Inputs:

• year: Year of the date in double (e.g., 2023)

• dateString: A string in the format ‘mm/dd/yyyy’ or ‘yyyy’ or ‘yyyy-mm-dd’

• datenumber: A regular matlab datenumber. Note that the function will treat the input as a date number if it has more than 4 digits. A warning will be issued as well

Example:

dateObj = ra(2023);

dateObj = ra(‘2023’);

dateObj = ra(‘01/01/2023’);

dateObj = ra(737999);

See also rd, rw, rm, rq, rh, ry