diff --git a/matlab/@dynSeries/isequal.m b/matlab/@dynSeries/isequal.m
new file mode 100644
index 000000000..7bfcacb4e
--- /dev/null
+++ b/matlab/@dynSeries/isequal.m
@@ -0,0 +1,65 @@
+function C = isequal(A,B)
+
+% Overloads ne (~=) operator.
+%
+% INPUTS 
+%  o A      dynSeries object (T periods, N variables).
+%  o B      dynSeries object (T periods, N variables).
+%
+% OUTPUTS 
+%  o C      Integer scalar equal to zero or one.
+
+% 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 nargin~=2
+    error('dynSeries::eq: I need exactly two input arguments!')
+end
+
+if ~(isa(A,'dynSeries') && isa(B,'dynSeries'))
+    error('dynSeries::eq: Both input arguments must be dynSeries objects!')
+end
+
+if ~isequal(A.nobs,B.nobs)
+    C = 0;
+    return
+end
+
+if ~isequal(A.vobs,B.vobs)
+    C = 0;
+    return
+end
+
+if ~isequal(A.freq,B.freq)
+    C = 0;
+    return
+end
+
+if ~isequal(A.init,B.init)
+    C = 0;
+    return
+end
+
+if ~isequal(A.name,B.name)
+    warning('dynSeries::eq: Both input arguments do not have the same variables!')
+end
+
+if ~isequal(A.tex,B.tex)
+    warning('dynSeries::eq: Both input arguments do not have the same tex names!')
+end
+
+C = isequal(A.data, B.data);
\ No newline at end of file
diff --git a/matlab/@dynSeries/ne.m b/matlab/@dynSeries/ne.m
new file mode 100644
index 000000000..877086128
--- /dev/null
+++ b/matlab/@dynSeries/ne.m
@@ -0,0 +1,100 @@
+function C = ne(A,B) % --*-- Unitary tests --*--
+
+% Overloads ne (~=) operator.
+%
+% INPUTS 
+%  o A      dynSeries object (T periods, N variables).
+%  o B      dynSeries object (T periods, N variables).
+%
+% OUTPUTS 
+%  o C      T*N matrix of zeros and ones. Element C(t,n) is nonzero iff observation t of variable n in A and B are different.  
+%
+% REMARKS 
+%  If the number of variables, the number of observations or the frequencies are different in A and B, the function returns one. 
+
+% 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 nargin~=2
+    error('dynSeries::ne: I need exactly two input arguments!')
+end
+
+if ~(isa(A,'dynSeries') && isa(B,'dynSeries'))
+    error('dynSeries::ne: Both input arguments must be dynSeries objects!')
+end
+
+if ~isequal(A.nobs,B.nobs)
+    warning('dynSeries::eq: Both input arguments should have the same number of observations!')
+    C = 1;
+    return
+end
+
+if ~isequal(A.vobs,B.vobs)
+    warning('dynSeries::eq: Both input arguments should have the same number of observations!')
+    C = 1;
+    return
+end
+
+if ~isequal(A.freq,B.freq)
+    warning('dynSeries::eq: Both input arguments should have the same frequencies!')
+    C = 1;
+    return
+end
+
+if ~isequal(A.init,B.init)
+    warning('dynSeries::eq: Both input arguments should have the same initial period!')
+    C = 1;
+    return
+end
+
+if ~isequal(A.name,B.name)
+    warning('dynSeries::eq: Both input arguments do not have the same variables!')
+end
+
+if ~isequal(A.tex,B.tex)
+    warning('dynSeries::eq: Both input arguments do not have the same tex names!')
+end
+
+C = ne(A.data, B.data);
+
+%@test:1
+%$ % Define a datasets.
+%$ A = rand(10,3);
+%$ B = A;
+%$ B(:,3) = rand(10,1);
+%$
+%$ % Define names
+%$ A_name = {'A1';'A2';'A3'}; B_name = A_name;
+%$
+%$ t = zeros(2,1);
+%$
+%$ % Instantiate a time series object.
+%$ try
+%$    ts1 = dynSeries(A,[],A_name,[]);
+%$    ts2 = dynSeries(B,[],B_name,[]);
+%$    ts2 = ts1;
+%$    a = eq(ts1,ts2);
+%$    t(1) = 1;
+%$ catch
+%$    t = 0;
+%$ end
+%$
+%$ if length(t)>1
+%$    t(2) = dyn_assert(a,[ones(10,2), ones(10,1)]);
+%$ end
+%$ T = all(t);
+%@eof:1
\ No newline at end of file