Added two methods returning year and subperiod.

src/@dates/subperiod.m

+function s = year(d)
+
+% Returns the subperiod (quarter, month or week depending on the frequency).    
+
+% Copyright (C) 2016 Dynare Team
+%
+% This code is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare dates submodule is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+s = d.time(2);
\ No newline at end of file

src/@dates/subsref.m

@@ -36,7 +36,7 @@ switch S(1).type
             error(['dates::subsref: ' S(1).subs ' is not a method but a member!'])
         end
         B = builtin('subsref', A, S(1));
-      case {'sort','sort_','unique','unique_','double','isempty','length','char','ndat'}% Public methods (without input arguments)
+      case {'sort','sort_','unique','unique_','double','isempty','length','char','ndat','year','subperiod'}% Public methods (without input arguments)
         B = feval(S(1).subs,A);
         if length(S)>1 && isequal(S(2).type,'()') && isempty(S(2).subs)
            S = shiftS(S,1);

src/@dates/year.m

+function y = year(d)
+
+% Returns the year.    
+
+% Copyright (C) 2016 Dynare Team
+%
+% This code is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 3 of the License, or
+% (at your option) any later version.
+%
+% Dynare dates submodule is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+y = d.time(1);
\ No newline at end of file