python matplotlib 注释文本箭头简单代码示例
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", ha="center", va="center", size=20, bbox=bbox_props) bbox_props = dict(boxstyle="rarrow", fc=(0.8, 0.9, 0.9), ec="b", lw=2) t = ax.text(0, 0, "Direction", ha="center", va="center", 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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