%% Add Categories at End
% Create a nonordinal categorical array.

A = categorical({'republican' 'democrat' 'republican';...
    'democrat' 'republican' 'democrat'})

%
% Display the categories of A.

categories(A)

% A is a 2-by-3 categorical array with two categories.
%
% Add the categories, independent and undeclared, to the end of the category list.

B = addcats(A,{'independent' 'undeclared'})

% B contains the same values as A.
%
% Display the categories of B.

categories(B)

% B is a 2-by-3 categorical array with four categories.
% Copyright 2012 The MathWorks, Inc.