matplotlib中现有笛卡尔坐标和phi值的极地地图

import matplotlib.pyplot as plt
import numpy as np

fig = plt.figure()
ax = fig.add_subplot(111, polar=True)

phi = np.linspace(0, 2*np.pi, 100)  # phi值范围
r = np.linspace(0, 1, 100)  # 笛卡尔坐标范围

ax.plot(phi, r)

ax.set_xticks(np.linspace(0, 2*np.pi, 8))  # 设置刻度
ax.set_xticklabels(['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'])  # 设置标签
ax.set_yticks(np.linspace(0, 1, 5))  # 设置刻度
ax.set_yticklabels(['0', '0.25', '0.5', '0.75', '1'])  # 设置标签

ax.set_title('Polar Map')  # 添加标题
ax.grid(True)  # 添加网格线

plt.show()