注释文本箭头

结果展示：

完整代码示例：

import numpy as np

import matplotlib.pyplot as plt

fig,ax = plt.subplots(figsize=(5,5))

ax.set_aspect(1)

x1 = -1 + np.random.randn(100)

y1 = -1 + np.random.randn(100)

x2 = 1. + np.random.randn(100)

y2 = 1. + np.random.randn(100)

ax.scatter(x1,y1,color="r")

ax.scatter(x2,y2,color="g")

bbox_props = dict(boxstyle="round",fc="w",ec="0.5",alpha=0.9)

ax.text(-2,-2,"Sample A",ha="center",va="center",size=20,bbox=bbox_props)

ax.text(2,2,"Sample B",bbox=bbox_props)

bbox_props = dict(boxstyle="rarrow",fc=(0.8,0.9,0.9),ec="b",lw=2)

t = ax.text(0,"Direction",rotation=45,size=15,bbox=bbox_props)

bb = t.get_bbox_patch()

bb.set_boxstyle("rarrow",pad=0.6)

ax.set_xlim(-4,4)

ax.set_ylim(-4,4)

plt.show()

总结

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