Legend error. What did I do wrong here?
显示 更早的评论
I have 9 figures as per attached to make comparisons for the length, width and height using similar codes as below (this one was used for the width comparison).
I don't know why the legend for the plots of length and height comparions are correct but it is wrong for the width comparison. How to fix please?
if true
fig = figure(16);
ax = axes(fig);
xlabel('\xi');
ylabel(' \omega(\xi,\tau)');
title('Varying injection rates vs fracture width');
h1 = openfig('width0.fig','reuse');
h2 = openfig('width1.fig','reuse');
h3 = openfig('width2.fig','reuse');
copyobj(h1.Children.Children,ax);
copyobj(h2.Children.Children,ax);
copyobj(h3.Children.Children,ax);
close(h1);
close(h2);
close(h3);
end
hold on
legend('\alpha=0','\alpha=1/9','\alpha=1/10','location', 'northeast')
1 个评论
% if true
% code
%end
legend([h1(1),h2(2),h3(3)], '\alpha=0','\alpha=1/9','\alpha=1/10','location', 'northeast')
采纳的回答
The "width" figures contain multiple lines on top of each other just like in your last question.
h = openfig('width0.fig');
h.Children.Children
% 2×1 Line array:
%
% Line
% Line
You'll see two line objects. If you only want to copy one of them,
copyobj(h.Children.Children(1),ax);
% ^^^
9 个评论
Hai Nguyen
2020-10-3
Adam Danz
2020-10-3
Yes, specify which handles should appear in the legend.
h1 = copyobj(___);
h2 = copyobj(___);
h3 = copyobj(___);
legend([h1(1), h2(1), h3(1)], ___)
Hai Nguyen
2020-10-3
Hai Nguyen
2020-11-1
The legend is a child of the figure. You can see the legend handle in h.Children where h is the handle to the figure.
You can copy the legend along with its associated axes but you cannot copy the legend-only. For example,
fig1 = figure();
ax1 = axes(fig1);
plot(ax1, magic(5));
title(ax1, 'Fig 1');
leg = legend(ax1);
fig2 = figure;
h = copyobj([ax1, leg], fig2)
title(h(1), 'Fig 2');
If you want to get the legend handle after the plot is created,
legendHandle = findobj(fig1,'Type','Legend');
Alternatively, you can create recreate the lenged in fig 2 by using the DisplayName properties of graphics objects.
fig1 = figure();
ax1 = axes(fig1);
hold(ax1, 'on')
h(1) = plot(1:5,1:5, 'DisplayName', 'Line 1');
h(2) = plot(1:5,2:6, 'DisplayName', 'Line 2');
h(3) = plot(1:5,3:7, 'DisplayName', 'Line 3');
title(ax1, 'Fig 1');
leg = legend(ax1);
% Create 2nd figure & axes
fig2 = figure;
ax2 = axes(fig2);
% Copy the first 2 lines only
copyobj(h(1:2), ax2)
% Recreate legend using DisplayName properties
legend(ax2)
Hai Nguyen
2020-11-1
Adam Danz
2020-11-1
I updated my comment above.
Hai Nguyen
2020-11-2
Sorry I still can't do as you instructed. It seems that I copied all the lines of each object for the legend again and the explanations in it are still unchanged (data 1, data 2...).
Code is as below:
fig1 = figure();
ax1 = axes(fig1);
xlabel('\xi');
ylabel(' \omega(\xi,\tau)');
title(ax1,'Varying injection rates vs fracture width');
leg=legend(ax1,'\alpha=0','\alpha=1/9','\alpha=1/10','location', 'northeast');
h1 = openfig('width0.fig','reuse');
h2 = openfig('width1.fig','reuse');
h3 = openfig('width2.fig','reuse');
copyobj(h1.Children.Children,ax1);
copyobj(h2.Children.Children,ax1);
copyobj(h3.Children.Children,ax1);
close(h1);
close(h2);
close(h3);
fig2=figure();
h = copyobj([ax1, leg], fig2);
title(h(1),'Varying injection rates vs fracture width');
Result:
Adam Danz
2020-11-2
"data 1, data2, data 3,..." appears in the legend when the graphics objects do not contain a value for DisplayName as my comment above indicates. If you didn't assign a DisplayName value when you created those lines, then you'll have to recreate the legend from scratch after copying the lines.
fig1 = figure();
ax1 = axes(fig1);
hold on
h1 = openfig('width0.fig','reuse');
h2 = openfig('width1.fig','reuse');
h3 = openfig('width2.fig','reuse');
copyobj(h1.Children.Children,ax1);
copyobj(h2.Children.Children,ax1);
copyobj(h3.Children.Children,ax1);
close(h1);
close(h2);
close(h3);
xlabel('\xi');
ylabel(' \omega(\xi,\tau)');
title(ax1,'Varying injection rates vs fracture width');
leg=legend(ax1,'\alpha=0','\alpha=1/9','\alpha=1/10','location', 'northeast');
This assumes there 3 objects that are copied, since there are 3 strings defined in legend().
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