从底轴镜像缩放，使其也显示在顶轴上

import matplotlib.pyplot as plt

def mirror_and_scale(points, scale_factor):
    mirrored_points = [(x, -scale_factor * y) for x, y in points]
    return mirrored_points

# 示例点集
original_points = [(1, 2), (2, 3), (3, 1)]

# 缩放因子
scale_factor = 2

# 镜像并缩放
mirrored_scaled_points = mirror_and_scale(original_points, scale_factor)

# 绘制结果
plt.scatter([x for x, y in original_points], [y for x, y in original_points], color='blue', label='Original')
plt.scatter([x for x, y in mirrored_scaled_points], [y for x, y in mirrored_scaled_points], color='red', label='Mirrored and Scaled')
plt.axhline(0, color='black', linewidth=0.5)
plt.axvline(0, color='black', linewidth=0.5)
plt.legend()
plt.show()