The legend box in plot has no colors

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Arihant Anchalia
Arihant Anchalia 2020-4-29
回答： Luca Schibik 2022-10-27
The legend box in matlab has no colours.
This is the code:
x = linspace(0,pi);
y1 = cos(x);
plot(x,y1,'DisplayName','cos(x)')
hold on
y2 = cos(2*x);
plot(x,y2,'DisplayName','cos(2x)')
hold off
legend

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回答（3 个）

Star Strider
Star Strider 2020-5-2
This is a known problem with recent AMD graphics drivers.
See for example: Lines in legend are missing
Updated drivers that solve this problem may by now be available.
.
Vinai Datta Thatiparthi
Hey Arihant,
Although I'm unable to reproduce the error that you mention at my end, I have noticed a few instances where other users have reported the same issue. Here are the links to those discussion on the MATLAB Answers forum:
Link1
Link2
As a workaround, please perform a clean reinstall of MATLAB and update your graphics drivers to get your code to work as expected.
Hope this helps!
Luca Schibik
Luca Schibik 2022-10-27
Hi, I have the same issue. I resolved it by imposing LineWidth. Once you have set it, you will have full legend! Try this little code in order to check
x=0:0.1:10;
y=sin(x);
z=sin(2*x);
figure(1)
plot(x,y,'LineWidth',2)
ylim([-2 2])
hold on
plot(x,z,'LineWidth',2)
grid on
legend ('sin(x)','sin(2x)')
Hope this help!

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