[Tips] Apply for and subplot to automatically generate batch images in matlab

When using matlab to draw pictures, sometimes you need to use subplot to generate dozens of pictures to see together, such as the following program:

clc;
clear;
close all;
warning off;


y(:,1) = rand(100,1);
y(:,2) = rand(100,1);
y(:,3) = rand(100,1);
y(:,4) = rand(100,1);
y(:,5) = rand(100,1);
y(:,6) = rand(100,1);
y(:,7) = rand(100,1);
y(:,8) = rand(100,1);
y(:,9) = rand(100,1);


figure;
subplot(3,3,1);plot(y(:,1));title('y1');
subplot(3,3,2);plot(y(:,2));title('y2');
subplot(3,3,3);plot(y(:,3));title('y3');
subplot(3,3,4);plot(y(:,4));title('y4');
subplot(3,3,5);plot(y(:,5));title('y5');
subplot(3,3,6);plot(y(:,6));title('y6');
subplot(3,3,7);plot(y(:,7));title('y7');
subplot(3,3,8);plot(y(:,8));title('y8');
subplot(3,3,9);plot(y(:,9));title('y9');

It can be seen that 9 graphs are generated, but when there are many graphs generated, the above programming method is very troublesome, and it is also very inconvenient to modify.

Here is a simple for loop generation method, the code is as follows:

clc;
clear;
close all;
warning off;


y(:,1) = rand(100,1);
y(:,2) = rand(100,1);
y(:,3) = rand(100,1);
y(:,4) = rand(100,1);
y(:,5) = rand(100,1);
y(:,6) = rand(100,1);
y(:,7) = rand(100,1);
y(:,8) = rand(100,1);
y(:,9) = rand(100,1);

figure;
for i = 1:9
    subplot(3,3,i);plot(y(:,i));title(['y',num2str(i)]);
end

 Through the for loop, nine pictures can be generated in one sentence. Note that the title needs to be rewritten as: ['y', num2str(i)], so that the small label of y can automatically change with i.