matplotlib图例:在一行中包含来自两个不同图形的标记和线 [英] matplotlib legend: Including markers and lines from two different graphs in one line

问题描述

我一直在进行一些线性回归，并希望在图例中的同一行上绘制标记(原始数据)和线条(回归).为简单起见，这是一个伪回归:

I've been doing some linear regression and want to plot the markers (original data) and the lines (regression) on the same line in the legend. For simplicity, here's a fake regression:

from pylab import *
ax = subplot(1,1,1)
p1, = ax.plot([1,2,3,4,5,6],'r-', label="line 1")
p2, = ax.plot([6,5,4,3,2,1],'b-', label="line 2")

p3, = ax.plot([1.2,1.8,3.1,4.1,4.8,5.9],'ro', label="dots 1")
p4, = ax.plot([6.1,5.1,3.8,3.1,1.9,0.9],'bo', label="dots 2")

ax.legend(loc='center right',numpoints=1)
show()

因此，我希望图例由2行组成，每行显示一行和一个点，而不是4行.我该怎么办?

So I want the legend to consist of 2 lines, each showing a line and a dot, instead of 4 lines. How can I do that?

推荐答案

您只需要直接使用legend即可.参见 Matplotlib -如何在不使线条透明的情况下使标记面颜色透明和用户指南.

You just need to use legend a bit more directly. See Matplotlib - How to make the marker face color transparent without making the line transparent and user guide.

ax.legend([(p1, p3), (p2, p4)], ['set 1', 'set 2'])
plt.draw()

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