Remove legend from patches in Matlab

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gummiyummi
gummiyummi 2020-9-15
回答： Steven Lord 2020-9-15
I create hundreds of patches using patch() in my subplots.
I have 5 subplots, 4 of which have legend entries.
I create several figures all with patches using a for loop.
My figure with subplots + patches, comes up with not only the legend entries for the data, but also from the patches which is covering my plot!
I tried the following but nothing has worked:
% loop to create figures of the subplot with patches
for i=1:length(ix)
... % code to create plot in a figure
for j=1:length(iy) % numbering for patches
legend('off');
set(0,'DefaultLegendAutoUpdate','off');
... % code to create patches on all subplots
end
end
on other matlab questions, supposedly doing legend('off') and set(0,'DefaultLegendAutoUpdate','off') solved the problem, however it just isn't working for me. Anybody help?

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回答（1 个）

Steven Lord
Steven Lord 2020-9-15
Specify the handles of the objects that you want to see in the legend when you create it.
x = 0:360;
axis([0 360 -1 1])
hold on
sineCurves = gobjects(1, 5);
for k = 1:5
sineCurves(k) = plot(x, sind(k*x), 'DisplayName', "sine of " + k + "*x");
end
legend(sineCurves([1 3 4]))
The curves for the sine of 2*x and 5*x appear in the plot but not in the legend.

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