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    %% Test for Categories  

%% 
% Create an ordinal categorical array, |A|. 
A = categorical({'shirt' 'pants'; 'pants' 'hat'; 'shirt' 'pants'}) 

%%
% |A| is a 3-by-2 categorical array.  

%% 
% Test if the articles of clothing, |shirt|, |pants|, |socks|, and |shoes|,
% are categories of |A|. 
catnames = {'shirt' 'pants' 'socks' 'shoes'};
tf = iscategory(A,catnames) 

%%
% |shirt| and |pants| are categories of |A|, but |socks| and |shoes| are not. 

%%
% |iscategory| does not tell us anything about the category, |hat|, which
% we did not include in |catnames|.