MATLAB中柱状图（bar）的完美使用

clear;clc;  
    x=[1 2 3 4 5 6 7 8];%  
    % training20_testing50  
    % y1=[69 33 90 95 96 94 100 73];  
    % y2=[94 67 88 93 98 85 100 77];  
      
    % training10_testing50  
     y1=[60 51 83 69 96 61 100 61];  
     y2=[92 46 63 95 98 54 98 60];  
    y_all=[y1;y2]';  
    bar(x,y_all)  
    title(' 10-Training and 50-Testing')  
    xlabel('Class')  
    ylabel('Accuracy')  
    legend('SVM','NN')  
    set(gca,'xticklabel',{'Hyt','Maple','Su','Zm','Bob','Hly','Hhf','Yq'});