MATLAB图中选定图对象的图例 [英] legend for selected plot objects in MATLAB figure

问题描述

对于MATLAB图形，我有类似的东西:

For a MATLAB figure, I have something like:

figure; hold on;
line ( [1 2], [3 4] );
line ( [5 6], [7 8] );

plot(x1,y1,'r.');
plot(x2,y2,'b.');

其中x1，y1，x2，y2都是向量.

where x1,y1,x2,y2 are all vectors.

如何仅对最后两个图添加legend，而不对两行添加legend?

How can I add legend for only the last two plots, not for the two lines?

推荐答案

您将必须获取最后两个图的句柄，并告诉legend仅为这两个图绘制.例如:

You will have to get the handles for the last two plots and tell legend to plot only for those two. For example:

h1 = plot(x1,y1,'r.');
h2 = plot(x2,y2,'b.');
legend([h1,h2],'red','blue')

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