How to Add Title to Legend ?

Question

Muhammad Salem 2023-12-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2056799-how-to-add-title-to-legend

评论： Muhammad Salem 2023-12-6

I want to add a title to legend, as shown in the picture inside the red circle. How do I do that, knowing that I am using Matlab 2013 ?

I tried several times to implement it, but I did not achieve any results...

This is the code I want to execute....

% Clear workspace.
clear all
% Clear command window.
clc
% Close all windows.
close all
% Compute Min Separation (dpt) two sources when pt1=2 and dx=0.5 and z=30
N = 3:1:20;
dpt1 = [7.75, 5.4, 4.13, 3.35, 2.82, 2.43, 2.14, 1.91, 1.72, 1.57, 1.44, 1.333, 1.24, 1.16, 1.088, 1.025, 0.97, 0.918];
% Compute Min Separation (dpt) two sources when pt1=2 and dx=0.5 and z=50
dpt2 = [12.88, 8.97, 6.884, 5.581, 4.695, 4.05, 3.56, 3.18, 2.87, 2.615, 2.405, 2.222, 2.068, 1.932, 1.815, 1.709, 1.615, 1.532];
% Compute Min Separation (dpt) two sources when pt1=2 and dx=0.5 and z=70
dpt3 = [18.05, 12.55, 9.63, 7.812, 6.57, 5.67, 4.99, 4.453, 4.02, 3.662, 3.363, 3.113, 2.895, 2.705, 2.54, 2.394, 2.263, 2.145];
figure(1);
grid on;
title('Minimum Separation (dpt)');
xlabel('NO. of Antenna');
ylabel('Minimum Separation (dpt)');
hold on;
plot(N, dpt1, 'r');
plot(N, dpt2, 'g');
plot(N, dpt3, 'b');
hold off;
lgd = legend(sprintf('pt1 = %g cm, \\lambda = %g cm, \\Deltax = %g cm, Z = %g cm ', 2, 0.4, 0.5, 30),...
          sprintf('pt1 = %g cm, \\lambda = %g cm, \\Deltax = %g cm, Z = %g cm ', 2, 0.4, 0.5, 50),...
          sprintf('pt1 = %g cm, \\lambda = %g cm, \\Deltax = %g cm, Z = %g cm ', 2, 0.4, 0.5, 70));
  title(lgd,' Min Separation (dpt) ');

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madhan ravi 2023-12-6

移动：madhan ravi 2023-12-6

Thanks sir Walter, didn’t know about the NodeChildren.

Muhammad Salem 2023-12-6

@Walter Roberson

@madhan ravi

Thank you very much for your efforts.

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Answer 1

Steven Lord 2023-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/2056799-how-to-add-title-to-legend#answer_1366344

在 MATLAB Online 中打开

You're using a release of MATLAB that's more than ten years old. MATLAB has changed quite a bit during that decade, including a major series of changes to the Handle Graphics functionality in release R2014b. The legend function had its behavior change significantly with that series of changes if I recall correctly.

The following code worked for me in release R2013a. It does not look the same in that release as it does in newer releases (as I said above, major series of changes) but it did create a title. I don't know if there is a way to achieve the exact same appearance in the release you're using as in newer releases.

plot(1:10)
legh = legend('line y = x');
t = get(legh, 'Title');
set(t, 'String', 'hello')

But I strongly encourage you to consider upgrading to a newer release of MATLAB if it is possible.

3 个评论
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Steven Lord 2023-12-6

As I said, I don't know if there is a way to achieve the exact same appearance in the release you're using as in newer releases. The easiest way to get the legend to appear the way it does in more recent releases likely would be to upgrade to a more recent release.

Muhammad Salem 2023-12-6