具有相同标签的不同散点图标记 [英] Different scatterplot markers with the same label

问题描述

我遇到与> Matplotlib，图例类似的问题带有一个标签的多个不同标记.感谢这个问题，我得以实现以下目标:组合两个Pyplot补丁用于传说.

I am having 'similar' issues to Matplotlib, legend with multiple different markers with one label. I was able to achieve the following thanks to this question Combine two Pyplot patches for legend.

fig = pylab.figure()
figlegend = pylab.figure(figsize=(3,2))
ax = fig.add_subplot(111)
point1 = ax.scatter(range(3), range(1,4), 250, marker=ur'$\u2640$', label = 'S', edgecolor = 'green')
point2 = ax.scatter(range(3), range(2,5), 250, marker=ur'$\u2640$', label = 'I', edgecolor = 'red')
point3 = ax.scatter(range(1,4), range(3),  250, marker=ur'$\u2642$', label = 'S', edgecolor = 'green')
point4 = ax.scatter(range(2,5), range(3), 250, marker=ur'$\u2642$', label = 'I', edgecolor = 'red')
figlegend.legend(((point1, point3), (point2, point4)), ('S','I'), 'center',  scatterpoints = 1, handlelength = 1)
figlegend.show()
pylab.show()

但是，我的两个(金星和火星)标记在图例中重叠.我尝试使用handlelength玩，但这似乎无济于事.任何建议或评论都将有所帮助.

However, my two (venus and mars) markers overlap in the legend. I tried playing with handlelength, but that doesn't seem to help. Any suggestions or comments would be helpful.

推荐答案

这是我的变通方法MWE.我实际上绘制了两个额外的图形"，分别是point_g和point_r，它们具有我们将要使用的图例句柄.然后，我使用白色方形标记将其遮盖.根据需要绘制其余图.

Here's my work-around MWE. I actually plot two extra "plots", point_g and point_r which have the legend handles we will use. I then cover them up by using a white squre marker. Plot the remaining plots as desired.

import matplotlib.pyplot as plt
plt.rc('text', usetex=True)
plt.rc('text', **{'latex.preamble': '\\usepackage{wasysym}'})
plt.rc('lines', **{'markersize':20})

fig = plt.figure()

point_g, = plt.plot((0,), (0,), ls='none', marker='$\\male\\female$', mec='g')
point_r, = plt.plot((0,), (0,), ls='none', marker='$\\male\\female$', mec='r')
plt.plot((0,), (0,), marker='s', mec='w', mfc='w')

plt.plot(range(3), range(1,4), ls='none', marker='$\\male$', mec='g')
plt.plot(range(3), range(2,5), ls='none', marker='$\\male$', mec='r')
plt.plot(range(1,4), range(3), ls='none', marker='$\\female$', mec='g')
plt.plot(range(2,5), range(3), ls='none', marker='$\\female$', mec='r')

plt.axis([-0.1, 4.1, -0.1, 4.1])
plt.legend((point_g, point_r), ('Green', 'Red'),  markerscale=1.6, numpoints=1,
           borderpad=0.8, handlelength=3, labelspacing=1)

plt.show()

注意:如果您使用unicode符号，则不需要LaTeX前导.我无法让它们在我的系统(Linux)上运行，所以我使用了LaTeX符号.此方法适用于所有符号，只需删除plt.rc命令并将\\male和\\female更改为您的Unicode字符即可.

Note: You do not need the LaTeX preamble if you use unicode symbols. I couldn't get them working on my system (Linux) so I used the LaTeX symbols. This method will work with all symbols, just remove the plt.rc commands and change \\male and \\female to your unicode characters.

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