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/usr/share/dynare/matlab/@dates/ne.m is in dynare-common 4.4.1-1build1.

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function C = ne(A,B) % --*-- Unitary tests --*--

% Overloads ~= operator for dates objects.
%
% INPUTS 
%  o A    dates object with n or 1 elements.
%  o B    dates object with n or 1 elements.
%
% OUTPUTS 
%  o C    column vector of max(n,1) elements (zeros or ones).

% 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 ~isequal(nargin,2)
    error('dates::ne: I need exactly two input arguments!')
end

if ~isdates(A) || ~isdates(B)
    error(['dates::ne: Input arguments ''' inputname(1) ''' and ''' inputname(2) ''' have to be dates objects!'])
end

if ~isequal(A.freq,B.freq)
    C = 0;
    return
end

if isequal(A.ndat, B.ndat)
    C = transpose(any(transpose(ne(A.time,B.time))));
else
    if isequal(A.ndat,1) || isequal(B.ndat,1)
        C = transpose(any(transpose(bsxfun(@ne,A.time,B.time))));
    else
        C = 0;
    end
end

%@test:1
%$ % Define some dates objects
%$ d1 = dates('1950Q1','1950Q2','1950Q3','1950Q4') ;
%$ d2 = dates('1960Q1','1960Q2','1960Q3','1960Q4') ;
%$ d3 = dates('1950Q1','1960Q2','1950Q3','1960Q4') ;
%$
%$ % Call the tested routine.
%$ t1 = d1~=d1;
%$ t2 = d1~=d2;
%$ t3 = d1~=d3;
%$
%$ % Check the results.
%$ t(1) = dyn_assert(t1,zeros(4,1));
%$ t(2) = dyn_assert(t2,ones(4,1));
%$ t(3) = dyn_assert(t3,[0; 1; 0; 1]);
%$ T = all(t);
%@eof:1

%@test:2
%$ % Define some dates objects
%$ d1 = dates('1950Q1') ;
%$ d2 = dates('1960Q1') ;
%$ d3 = dates('1960Q1') ;
%$
%$ % Call the tested routine.
%$ t1 = d1~=d1;
%$ t2 = d1~=d2;
%$ t3 = d1~=d3;
%$
%$ % Check the results.
%$ t(1) = dyn_assert(t1,0);
%$ t(2) = dyn_assert(t2,1);
%$ t(3) = dyn_assert(t3,1);
%$ T = all(t);
%@eof:2

%@test:3
%$ % Define some dates objects
%$ d1 = dates('1950Q1','1950Q2','1950Q3','1950Q4') ;
%$ d2 = dates('1950Q2') ;
%$ d3 = dates('1970Q1') ;
%$
%$ % Call the tested routine.
%$ t1 = d1~=d2;
%$ t2 = d1~=d3;
%$
%$ % Check the results.
%$ t(1) = dyn_assert(t1,[1; 0; 1; 1]);
%$ t(2) = dyn_assert(t2,ones(4,1));
%$ T = all(t);
%@eof:3