我(几乎)一直对这个问题感到恼火,并且大多数最终都使用annotate()
绘制箭头。例如(缺乏大量调整才能得到与您的情节相同的结果......):
import matplotlib.pyplot as plt
import pylab as plab
plt.figure()
ax=plt.subplot(211)
plt.plot([0,2], [2,0], color='c', lw=0.5)
plt.plot([1,2], [2,1], color='k', lw=0.5)
plt.arrow(1,1,0.5,0.5, head_width=0.1, width=0.01, head_length=0.1, color='r')
ax.set_aspect(0.5)
ax=plt.subplot(212)
plt.plot([0,2], [2,0], color='c', lw=0.5)
plt.plot([1,2], [2,1], color='k', lw=0.5)
ax.annotate("",
xy=(1.5, 1.5), xycoords='data',
xytext=(1, 1), textcoords='data',
arrowprops=dict(arrowstyle="-|>",
connectionstyle="arc3"),
)
ax.set_aspect(0.5)
plt.show()