Skip legend with empty line

19 次查看（过去 30 天）
Zheng Liu
Zheng Liu 2018-1-10
评论： Star Strider 2018-11-20
Hi folks,
I found specifying Matlab legend confusing when I have a line that could be empty (then has an empty handle). I want to skip the legend for empty line. For example:
h1 = plot([]); % Blue line
hold on;
h2 = plot(rand(1,10),'r'); % Red line
h3 = plot(rand(1,10),'g'); % Green line
legend([h1 h2 h3],{'want to withdraw this if line unexist', 'hello', 'world'});
In this case, the legend for h1 will be assigned on h2, and the legend for h3 will be ignored.
Do you have any better solution rather than doing (since I might have different lines empty or not, and I just want the matched legends):
h1 = plot([]); % Blue line
hold on;
h2 = plot(rand(1,10),'r'); % Red line
h3 = plot(rand(1,10),'g'); % Green line
if ~isempty(h1)
legend([h1 h2 h3],{'want to skip this if line unexist', 'hello', 'world'})
else
legend([h2 h3],{'hello', 'world'})
end
Thanks!

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2018-1-10
Try this:
h1 = plot([], 'DisplayName','want to withdraw this if line unexist'); % Blue line
hold on;
h2 = plot(rand(1,10),'r', 'DisplayName','hello'); % Red line
h3 = plot(rand(1,10),'g', 'DisplayName','world'); % Green line
legend('show')
  4 个评论
显示 2更早的评论
J D
J D 2018-11-20
I had a similar problem, this is perfect! Thanks.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Legend 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by