How to unify legend in plot command?

Question

Harr 2022-2-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1656670-how-to-unify-legend-in-plot-command

评论： Harr 2022-2-23

I have the following code making a line plots for 2 different groups. In the legend it dosent show legend per group (only the first group is correct). I wonder if there is some command can be added to each plot group to fix the problem? BTW i am using matlab2018b.

ax = gca;

ax.TickLength = [0.02 0.06];

set(gca,'XAxisLocation','top','YAxisLocation','left','ydir','reverse','XScale','log');

ax.XRuler.TickLabelGapOffset =-10;

ax.YLim = [0 20];

ax.XLim = [0 1];

ax.YDir= 'reverse';

x = [1 3 5 7];

y = [2 4 6 8];

z = [0.1 0.21 0.78 0.48];

plot([z;z], [x; y], 'LineWidth',3,'color',[0.9 0.4 0.5])

hold(gca,'on')

x = [2 8 9 14];

y = [3 9 14 20];

z = [0.9 0.1 0.71 0.38];

plot([z;z], [x; y], 'LineWidth',3,'color',[0.9 0.8 0.10])

hold(gca,'on')

legend("Group1_Red","Group2_Yellow")

hold(gca,'off')

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Answer 1

VBBV 2022-2-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1656670-how-to-unify-legend-in-plot-command#answer_902750

在 MATLAB Online 中打开

ax = gca; 
ax.TickLength = [0.02 0.06];
set(gca,'XAxisLocation','top','YAxisLocation','left','ydir','reverse','XScale','log');
ax.XRuler.TickLabelGapOffset =-10;
ax.YLim = [0 20];
ax.XLim = [0 1];
ax.YDir= 'reverse';
x = [1 3 5 7];                  
y = [2 4 6 8];                   
z = [0.1 0.21 0.78 0.48];                      
h1 = plot([z;z], [x; y], 'LineWidth',3,'color',[0.9 0.4 0.5])
hold(gca,'on')
x = [2 8 9 14];                  
y = [3 9 14 20];                   
z = [0.9 0.1 0.71 0.38];                      
h2  = plot([z;z], [x; y], 'LineWidth',3,'color',[0.9 0.8 0.10])
hold(gca,'on')
legend([h1(1) h2(1)],{"Group1_Red","Group2_Yellow"})
hold(gca,'off')