How to code a figure having subplots with a for loop?

Question

Hsinho Huang 2017-1-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/319443-how-to-code-a-figure-having-subplots-with-a-for-loop

编辑： balandong 2020-4-10

I want to simply the following codes to make a figure with 2-by-6 subplots. How can I make it with a for loop?

     figure(1);
     h1=subplot(2,6,1), hLine1=plot(X,A(1,:),X,B(1,:));title(type{1});
     h2=subplot(2,6,2), hLine2=plot(X,A(2,:),X,B(2,:));title(type{2});
     h3=subplot(2,6,3), hLine3=plot(X,A(3,:),X,B(3,:));title(type{3});
     h4=subplot(2,6,4), hLine4=plot(X,A(4,:),X,B(4,:));title(type{4});
     h5=subplot(2,6,5), hLine5=plot(X,A(5,:),X,B(5,:));title(type{5});
     h6=subplot(2,6,6), hLine6=plot(X,A(6,:),X,B(6,:));title(type{6});
     h7=subplot(2,6,7), hLine7=plot(X,A(7,:),X,B(7,:));title(type{7});
     h8=subplot(2,6,8), hLine8=plot(X,A(8,:),X,B(8,:));title(type{8});
     h9=subplot(2,6,9), hLine9=plot(X,A(9,:),X,B(9,:));title(type{9});
    h10=subplot(2,6,10), hLine10=plot(X,A(10,:),X,B(10,:));title(type{10});
    h11=subplot(2,6,11), hLine11=plot(X,A(11,:),X,B(11,:));title(type{11});
    h12=subplot(2,6,12), hLine12=plot(X,A(12,:),X,B(12,:));title(type{12});

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Stephen23 2017-1-8

编辑：Stephen23 2017-1-8

Creating handles h1, h2, h3, etc would be a very bad idea. Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

The best solution is to use cell arrays, exactly as Star Strider has shown you.

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Answer 1

Star Strider 2017-1-7

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https://ww2.mathworks.cn/matlabcentral/answers/319443-how-to-code-a-figure-having-subplots-with-a-for-loop#answer_249726

在 MATLAB Online 中打开

I would do it this way:

figure(1)
for k1 = 1:12
    subplot(2,6,k1)
    h{k1} = plot(X,A(k1,:),X,B(k1,:));title(type{k1});
end

NOTE — I do not have your data so this is UNTESTED CODE. It should work.

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Hsinho Huang 2017-1-8

Thanks! In the suggested code, are the handles of each subplot and each line assigned? I need the handles h1-12 and hLine1-12 to set their properties.

Star Strider 2017-1-8

在 MATLAB Online 中打开

My pleasure!

I didn’t initially see that you had two sets of handles. The revised code would be:

figure(1)
for k1 = 1:12
    h{k1} = subplot(2,6,k1)
    hLine{k1} = plot(X,A(k1,:),X,B(k1,:));title(type{k1});
end

The handles to the subplots are in the cell array ‘h’, and to the plot in the cell array ‘hLine’.

See the documentation on Cell Arrays if you are not familiar with them.

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Answer 2

balandong 2020-4-6

1
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https://ww2.mathworks.cn/matlabcentral/answers/319443-how-to-code-a-figure-having-subplots-with-a-for-loop#answer_424348

在 MATLAB Online 中打开

I would propose something like @strider, but using curly instead.

figure(1)
for k1 = 1:12
    h(k1) = subplot(2,6,k1)
    hLine(k1)= plot(X,A(k1,:),X,B(k1,:));title(type{k1});
end

The reason is for, in some circumstances, one would like to link axes among the subplot. And by using the curly braces,, the link axes can be simply achieved as follow

linkaxes(h,'x');

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Priyank Sharma 2020-4-10

However, trying your logic, it shows me subplot (2,1,1), while subplot (2,1,2) on different figures and not on the same figure. I want it should retain (2,1,1) and plot (2,1,2) on the same figure during execution in the loop. Kindly pls suggest.

balandong 2020-4-10