Global legend for all subplots in a figure placed ON the figure (not outside the figure)?

Question

Henriette Larsen 2021-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/744387-global-legend-for-all-subplots-in-a-figure-placed-on-the-figure-not-outside-the-figure

回答： Henriette Larsen 2021-2-14

Hello :)

So, I'd like to make one legend on the second subplot (the big one to the right in the figure) and it has to be one legend for all three graphs with the red one appearing first.

BUT when I try the following as shown by the code below, I can only get the legend placed above the first subplot but below the second subplot, as if the legend belongs to the first subplot, so giving the legend a new position does not solve the problem.

Any help to solve this will be appreciated, thanks :)

Best regards, Henriettte

figure

ax1 = subplot(1,2,1);

hold on

p1 = plot(time1,temp1,'.-','MarkerSize',10,'Color',Cdefault(2,:));

P1 = get(gca, 'Position');

set(gca,'Units','Normalized','Position',P1.*[1 0.7 0.45 0.7])

xlabel('Time [min]','Interpreter','latex')

ylabel('Surface temperature [$^{\circ}$C]','Interpreter','latex')

ax2 = subplot(1,2,2);

p2 = plot(time2,temp2,'.-','MarkerSize',10,'Color',[0.2 0.6 1.0]);

hold on

p3 = plot(time3,temp3,'.-','MarkerSize',10,'Color',[0.0 0.0 0.8]);

P2 = get(gca, 'Position');

set(gca,'Units','Normalized','Position',P2.*[0.55 0.7 2 0.7])

xlim([0 45])

xlabel('Time [min]','Interpreter','latex') % % %

linkaxes([ax1,ax2],'y');

set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0.05, 0.7, 1.0])

yticklabels(ax2,{})

t.TileSpacing = 'none';

legend([p1,p2,p3],{'Brake test on: Heating',...

'Brake test off: Natural cool down',...

'Brake test off + Cooling system on: Forced cool down',...

'Location','NorthEast'})

hold off

(specifications to 'prettyfy' the figure has been left out in the code)

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Answer 1

Henriette Larsen 2021-2-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/744387-global-legend-for-all-subplots-in-a-figure-placed-on-the-figure-not-outside-the-figure#answer_623202

In the mean time I have come around the problem in another way, that is by making a horisontal legend on top instead. It´s not what I wanted but looks okay, so this is fine.

/Henriette

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Answer 2

randerss simil 2021-2-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/744387-global-legend-for-all-subplots-in-a-figure-placed-on-the-figure-not-outside-the-figure#answer_622552

编辑：randerss simil 2021-2-13

在 MATLAB Online 中打开

figure
ax1 = subplot(2,1,1);
...% your code 
....
xlabel('Time [min]','Interpreter','latex') 
ylabel('Surface temperature [$^{\circ}$C]','Interpreter','latex')
ax2 = subplot(2,1,2);
...

Try subplot with something like above,

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Henriette Larsen 2021-2-13

编辑：Henriette Larsen 2021-2-13

@randerss simil, sry, I don't see how that solves anything... I am already using subplot. The problem is getting the legend on top of/in front of the second subplot (i.e. not hiding behind it like now as shown in my figure). Please explain your reasoning, thanks :)

/Henriette

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