www.gusucode.com > matlab 案例源码 matlab代码程序 > matlab/RemoveAllUnusedCategoriesExample.m
%% Remove All Unused Categories %% % Create a categorical array representing political parties of four people. A = categorical({'republican' 'democrat' 'democrat' 'republican'},... {'democrat' 'republican' 'independent'}) %% % |A| is a 1-by-4 categorical array. %% % Summarize the categorical array, |A|. summary(A) %% % |A| has three categories. |democrat| appears twice in the array, |republican| % appears twice in the array, and |independent| is unused. %% % Remove the unused category, |independent|. B = removecats(A) %% % |B| has the same values as |A|. %% % Display the categories of |B|. categories(B) %% % |B| has fewer categories than |A|.