简单Coord03注释示例

import matplotlib.pyplot as pltfrom matplotlib.text import OffsetFromfig, ax = plt.subplots(figsize=(3, 2))an1 = ax.annotate("Test 1", xy=(0.5, 0.5), xycoords="data", va="center", ha="center", bbox=dict(boxstyle="round", fc="w"))offset_from = OffsetFrom(an1, (0.5, 0))an2 = ax.annotate("Test 2", xy=(0.1, 0.1), xycoords="data", xytext=(0, -10), textcoords=offset_from, # xytext is offset points from "xy=(0.5, 0), xycoords=an1" va="top", ha="center", bbox=dict(boxstyle="round", fc="w"), arrowprops=dict(arrowstyle="->"))plt.show()
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