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%% Rows That Belong to a Set % Create two matrices with a row in common. % Copyright 2015 The MathWorks, Inc. A = [1 3 5 6; 2 4 6 8]; B = [2 4 6 8; 1 3 5 7; 2 4 6 8]; %% % Determine which rows of |A| are also in |B| as well as their % corresponding locations in |B|. [Lia, Locb] = ismember(A,B, 'rows') %% % The lowest index to |A(2,:)| is |B(1,:)|.