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Can not make Legend border visible

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qaqcvc
qaqcvc 2020-8-22
评论： Star Strider 2020-8-23
With the code below. This the example code from https://www.mathworks.com/help/matlab/ref/legend.html
x = linspace(0,pi);
y1 = cos(x);
plot(x,y1)
hold on
y2 = cos(2*x);
plot(x,y2)
legend('cos(x)','cos(2x)')
I got
The legend looks like this, which I can not understand.
If you check the last question I raised. All my figures have some problems with the legend. I do not know why. It seems that I need to change some settings of the matlab. The 2019b and 2020a both have this legend problem.
It looks like a very basic question. But it really annoys me for some time.
Any help, many thanks!

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采纳的回答

Star Strider
Star Strider 2020-8-22
This is a problem with certain AMD graphics drivers.
First, see if there is an update for the AMD driver. If so, let the AMD software update it for you.
In the interim, use:
opengl('software')
and if you want to save that for future sessions:
opengl('save','software')
However, it would be best to update the driver before you use the 'save' option. In the latest AMD driver versions, this is no longer a problem.
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the cyclist
the cyclist 2020-8-22
There is a box around the legend by default, and I cannot remember that ever not being the case.
Does this happen from a freshly started instance of MATLAB, having run no other code first?
Immediately after starting MATLAB, I would try each of the following, to see if any of them mention the legend:
  • get(0)
  • get(gcf)
  • type startup.m

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