.. index:: ra
.. _ra_help:

  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