Matplotlib 花式箭头/补丁边缘宽度

Question

以下代码将使用 matplotlib 生成一个精美的箭头：

import matplotlib.pyplot as plt

xy = [0.2,0.2]
xytext =[0.5,0.5]

plt.figure()
ax = plt.gca()
ax.annotate("", xy=xy, xytext=xytext,arrowprops=dict(arrowstyle="<|-", edgecolor = 'k', facecolor = 'r', shrinkA = 0, shrinkB = 0))

箭头是红色的，边缘是黑色的。如何控制黑边的宽度？

Answer 1

您可以使用linewidth 参数。下面是一个例子

import matplotlib.pyplot as plt

xy = [0.2,0.2]
xytext =[0.5,0.5]

plt.figure()
ax = plt.gca()
ax.annotate("Text", xy=xy, xytext=xytext, arrowprops=dict(arrowstyle="<|-, 
            head_width=2, head_length=2", edgecolor = 'k', facecolor = 'r',
            linewidth=4))