Added remove method.

src/@dates/remove.m

+function o = remove(o, p) % --*-- Unitary tests --*--
+
+% remove method for dates class (removes dates).
+%
+% INPUTS 
+% - o [dates]
+% - p [dates]
+%
+% OUTPUTS 
+% - o [dates]
+%
+% REMARKS 
+% 1. If a is a date appearing more than once in o, then all occurences are removed.
+% 2. The removal of p is done by inplace modification of o (in place version of setdiff).
+%
+% See also pop, setdiff
+
+% Copyright (C) 2013-2014 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/>.
+
+if nargin<2
+    error('dates:remove','Input argument is missing! You should read the manual')
+end
+
+if ~isdates(p)
+    error('dates:remove','Input argument %s has to be a dates object')
+end
+
+if ~isequal(o.freq,p.freq)
+    error('dates:remove','Inputs must have common frequency!')
+end
+
+if isoctave || matlab_ver_less_than('8.1.0')
+    time = setdiff(o.time,p.time,'rows');
+else
+    time = setdiff(o.time,p.time,'rows','legacy');
+end
+
+o.time = time;
+o.ndat = rows(time);
+
+%@test:1
+%$ % Define some dates objects
+%$ d = dates('1950Q1'):dates('1952Q4');
+%$ e = dates('1951Q1'):dates('1952Q4');
+%$ f = dates('1950Q1'):dates('1950Q4');
+%$
+%$ % Call the tested routine.
+%$ d.remove(e);
+%$
+%$ % Check the results.
+%$ t(1) = dassert(d,f);
+%$ T = all(t);
+%@eof:1
+
+%@test:2
+%$ % Define some dates objects
+%$ d = dates('1950Q1','1950Q2','1950Q1');
+%$ e = dates('1950Q1');
+%$ f = dates('1950Q2');
+%$
+%$ % Call the tested routine.
+%$ d.remove(e);
+%$
+%$ % Check the results.
+%$ t(1) = dassert(d,f);
+%$ T = all(t);
+%@eof:2
\ No newline at end of file

src/@dates/subsref.m

@@ -42,7 +42,7 @@ switch S(1).type
         if length(S)>1 && isequal(S(2).type,'()') && isempty(S(2).subs)
            S = shiftS(S,1);
         end
-      case {'append','pop'}% Public methods (with arguments).
+      case {'append','pop','remove'}% Public methods (with arguments).
         if isequal(S(2).type,'()')
             B = feval(S(1).subs,A,S(2).subs{:});
             S = shiftS(S,1);