matlab 绘制条状图形

clear,clc;
A=zeros(1080,1920,3);
A(:,1:384,:)=0;
A(:,385:768,:)=10;
A(:,769:1152,:)=20;
A(:,1153:1536,:)=30;
A(:,1537:1920,:)=40;
A=uint8(A);
imshow(A);