Why legend is not displayed?

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Sadiq Akbar 2023-2-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1906675-why-legend-is-not-displayed

评论： Sadiq Akbar 2023-2-5

采纳的回答： Simon Chan

在 MATLAB Online 中打开

How can I display the legend at my desired side outside the figure? I run the following code but it doesn't work:

clear all; close all; clc
one=rand(100,1); 
fitness2sn0=one';
one=rand(100,1); 
fitness2sn5=one'; 
one=rand(100,1); 
fitness2sn10=one'; 
one=rand(100,1);
fitness2sn15=one'; 
fitness2sn0=sort(fitness2sn0,'descend');
fitness2sn5=sort(fitness2sn5,'descend');
fitness2sn10=sort(fitness2sn10,'descend');
fitness2sn15=sort(fitness2sn15,'descend');
h1=boxplot([fitness2sn0; fitness2sn5; fitness2sn10; fitness2sn15].');
set(h1,{'linew'},{2}) 
grid
Ax = gca;
Ax.YLabel.String = '\bf fitness';
Ax.YScale = 'log';
Ax.XTickLabel = compose('2sn%d',[35 45 55 65]);
Ax.YLim = [1E-3 1e0]; 
title('\bf Fitness')
set(gca,'linew',2) 
lgd = legend('35dB', '45dB','55dB','65dB')
lgd.Location = 'southoutside';

采纳的回答

Simon Chan 2023-2-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1906675-why-legend-is-not-displayed#answer_1164000

在 MATLAB Online 中打开

You may refer to this answer https://www.mathworks.com/matlabcentral/answers/127195-how-do-i-add-a-legend-to-a-boxplot-in-matlab

and do the modification like the following:

one=rand(100,1);

fitness2sn0=one';

one=rand(100,1);

fitness2sn5=one';

one=rand(100,1);

fitness2sn10=one';

one=rand(100,1);

fitness2sn15=one';

fitness2sn0=sort(fitness2sn0,'descend');

fitness2sn5=sort(fitness2sn5,'descend');

fitness2sn10=sort(fitness2sn10,'descend');

fitness2sn15=sort(fitness2sn15,'descend');

colors = [1 0 0; 0 0.5 0; 0.5 0 0; 0 0 0.5]; % Add different color

h1=boxplot([fitness2sn0; fitness2sn5; fitness2sn10; fitness2sn15]','Colors',colors);

set(h1,{'linew'},{2})

grid

Ax = gca;

Ax.YLabel.String = '\bf fitness';

Ax.YScale = 'log';

Ax.XTickLabel = compose('2sn%d',[35 45 55 65]);

Ax.YLim = [1E-3 1e0];

title('\bf Fitness')

set(gca,'linew',2)

hChildren = findall(gca,'Tag','Box');

lgd = legend(hChildren([4 3 2 1]), {'35dB','45dB','55dB','65dB'});

lgd.Location = 'southoutside';

Simon's answer is the core of any solution to this problem, so it's appropriate that he gets credit. While it's sometimes unfortunate that comments can't be upvoted for emphasis, your comment is verification that it helped. That much is sufficient for my needs, and it should help any future readers with the same problem.

Sadiq Akbar 2023-2-5