%% List Categories in Ordinal Categorical Array
% Create an ordinal categorical array.

A = categorical({'medium' 'large'; 'small' 'xlarge'; 'large' 'medium'},...
    {'small' 'medium' 'large' 'xlarge'},'Ordinal',true)

% A is a 3-by-2 ordinal categorical array.
%
% Display the categories of A.

C = categories(A)

% The categories appear in the order in which you specified them. Since A is ordinal, the categories have the mathematical ordering small < medium < large < xlarge.
% Copyright 2012 The MathWorks, Inc.