%% Preserve Legacy Behavior of union
% Use the 'legacy' flag to preserve the behavior of union from R2012b and prior releases in your code.
% Find the union of A and B with the current behavior.

A = [5 7 1]; 
B = [3 1 1];
[C1,ia1,ib1] = union(A,B)

%
% Find the union of A and B, and preserve the legacy behavior.

A = [5 7 1]; 
B = [3 1 1];
[C2,ia2,ib2] = union(A,B,'legacy')

% Copyright 2012 The MathWorks, Inc.