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    %% Preserve Legacy Behavior of intersect  
% Use the |'legacy'| flag to preserve the behavior of |intersect| from
% R2012b and prior releases in your code.

%% 
% Find the intersection of |A| and |B| with the current behavior. 
A = [7 1 7 7 4]; 
B = [7 0 4 4 0];
[C1,ia1,ib1] = intersect(A,B)  

%% 
% Find the unique elements of |A| and preserve the legacy behavior. 
[C2,ia2,ib2] = intersect(A,B,'legacy')