使用透明标记但不透明的边缘进行绘图 [英] Plotting with a transparent marker but non-transparent edge

问题描述

我正在尝试在matplotlib中使用具有固定颜色边的透明标记来绘制图.但是，我似乎无法实现透明填充的标记.

I'm trying to make a plot in matplotlib with transparent markers which have a fixed color edge . However, I can't seem to achieve a marker with transparent fill.

我这里有一个最低限度的工作示例:

I have a minimum working example here:

import numpy as np
import matplotlib.pyplot as plt

x = np.arange(10)
y1 = 2*x + 1
y2 = 3*x - 5

plt.plot(x,y1, 'o-', lw=6, ms=14)
plt.plot(x,y2, 'o', ms=14, markerfacecolor=None, alpha=0.5, markeredgecolor='red', markeredgewidth=5)

plt.show()

我尝试了两种在网上找到的技术来实现这一目标: 1)设置alpha参数.然而，这也使标记边缘也透明，这不是期望的效果. 2)设置markerfacecolor = None，尽管这对我的情节没有影响

I tried two techniques I found online to achieve this: 1) Setting alpha parameter. However, this makes the marker edge transparent too, which is not the desired effect. 2) Setting markerfacecolor=None, although this has no effect on my plot

请问有解决办法吗?

推荐答案

在Matplotlib中这很棘手...您必须使用字符串"None"代替值None，然后您可以执行以下操作:

This is tricky in Matplotlib... you have to use a string "None" instead of the value None, then you can just do:

plt.plot(x,y2, 'o', ms=14, markerfacecolor="None",
         markeredgecolor='red', markeredgewidth=5)

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