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    %% Plot Categorical Histogram
% Create a categorical vector that represents votes. The categories in the
% vector are |'yes'|, |'no'|, or |'undecided'|.

% Copyright 2015 The MathWorks, Inc.

A = [0 0 1 1 1 0 0 0 0 NaN NaN 1 0 0 0 1 0 1 0 1 0 0 0 1 1 1 1];
C = categorical(A,[1 0 NaN],{'yes','no','undecided'})

%%
% Plot a categorical histogram of the votes, using a relative bar width of
% |0.5|.
h = histogram(C,'BarWidth',0.5)