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    %% Determine if Array Contains Duration Values  
% Determine if the output of an arithmetic calculation is a |duration| array.   

% Copyright 2015 The MathWorks, Inc.


%% 
% Subtract a |datetime| array from another. 
t1 = datetime(2014,03,16:17);
t2 = datetime(2014,03,20);
dt = t2 - t1  

%% 
% Determine if the output is a |duration| array. 
tf = isduration(dt)