清空筛选条件
清空筛选条件

Info

此问题已关闭。 请重新打开它进行编辑或回答。

Why can't I add plots to axes after creating a legend?

1 次查看（过去 30 天）
Avishek Mondal
Avishek Mondal 2017-7-8
关闭： MATLAB Answer Bot 2021-8-20
I was following the instructions here https://uk.mathworks.com/help/matlab/ref/legend.html. However, when I run the following code (is the same as one provided in the link) -
x = linspace(0,10);
y1 = sin(x);
plot(x,y1)
legend('First Line')
hold on
y2 = cos(x);
plot(x,y2,'DisplayName','Second Line')
I get the attached graph. Could someone please tell me why this is happening? Thank you!

此问题已关闭。

回答（1 个）

Image Analyst
Image Analyst 2017-7-8
legend() does not automatically update when you add stuff. How could it know what you want to call the additional curves? I don't know what the 'DisplayName' option is in plot(). My R2017a help for plot does not mention that as a possible option. Is that what you thought legend() would automatically use? Evidently not. You'll have to call legend after you're all done plotting curves, not before then.

此问题已关闭。

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by