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    %% Union of Vectors Containing NaNs  

%% 
% Define two vectors containing |NaN|. 
A = [5 NaN 1]; 
B = [4 NaN NaN];  

%% 
% Find the union of vectors |A| and |B|. 
C = union(A,B) 

%%
% |union| treats |NaN| values as distinct.