Added @dynDates/plus method.

matlab/@dynDates/plus.m

@@ -0,0 +1,87 @@
+function C = plus(A,B)
+
+%@info:
+%! @deftypefn {Function File} {@var{C} =} plus (@var{A},@var{B})
+%! @anchor{@dynDates/plus}
+%! @sp 1
+%! Overloads the plus (addition) operator for the @ref{dynDates} class. Combines two dynDates objects, A and B, without removing repetitions
+%! if A and B are not disjoints.
+%! @sp 2
+%! @strong{Inputs}
+%! @sp 1
+%! @table @ @var
+%! @item A
+%! @ref{dynDates} object.
+%! @item B
+%! @ref{dynDates} object.
+%! @end table
+%! @sp 2
+%! @strong{Outputs}
+%! @sp 1
+%! @table @ @var
+%! @item C
+%! @ref{dynDates} object.
+%! @end table
+%! @end deftypefn
+%@eod:
+
+% Copyright (C) 2013 Dynare Team
+%
+% This file is part of Dynare.
+%
+% Dynare 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 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 ~isa(A,'dynDates') || ~isa(B,'dynDates')
+    error(['dynDates::plus: Input arguments ''' inputname(1) ''' and ''' inputname(2) ''' must be dynDates objects!'])
+end
+
+if isempty(B)
+    C = A;
+    return
+end
+
+if isempty(A)
+    C = B;
+    return
+end
+
+if ~isequal(A.freq,B.freq)
+    error(['dynDates::plus: Input arguments ''' inputname(1) ''' and ''' inputname(2) ''' must have common frequencies!'])
+end
+
+C = dynDates();
+
+C.freq = A.freq;
+C.time = [A.time; B.time];
+C.ndat = A.ndat+B.ndat;
+
+%@test:1
+%$ % Define some dynDates objects
+%$ d1 = dynDate('1950Q1'):dynDate('1959Q4') ;
+%$ d2 = dynDate('1960Q1'):dynDate('1969Q4') ;
+%$ d3 = dynDate('1970Q1'):dynDate('1979Q4') ;
+%$
+%$ % Call the tested routine.
+%$ e1 = d1+d2;
+%$ e2 = d1+d2+d3;
+%$
+%$ % Expected results.
+%$ f1 = dynDate('1950Q1'):dynDate('1969Q4');
+%$ f2 = dynDate('1950Q1'):dynDate('1979Q4');
+%$
+%$ % Check the results.
+%$ t(1) = dyn_assert(e1==f1,1);
+%$ t(2) = dyn_assert(e2==f2,1);
+%$ T = all(t);
+%@eof:1