%% Rename One Category
% Create a categorical array containing colors.

A = categorical({'red' 'blue'; 'purple' 'white'; 'green' 'red'})

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

categories(A)

% A has five categories that are listed in alphabetical order.
%
% Change the category name from purple to violet.

B = renamecats(A,'purple','violet')

% The element B(2,1) is violet instead of purple.
%
% Display the categories of B.

categories(B)

% violet replaces purple and the categories are no longer in alphabetical order. Note that the category has not changed its position.
% Copyright 2012 The MathWorks, Inc.