极坐标绘图

一个简单的示例，展示如何使用 matplotlib 在极坐标中绘图。

import numpy as np

import matplotlib
import matplotlib.pyplot as plt


jet = matplotlib.colormaps["jet"]

ax = plt.axes((0.025, 0.025, 0.95, 0.95), polar=True)

N = 20
theta = np.arange(0.0, 2 * np.pi, 2 * np.pi / N)
rng = np.random.default_rng()
radii = 10 * rng.random(N)
width = np.pi / 4 * rng.random(N)
bars = plt.bar(theta, radii, width=width, bottom=0.0)

for r, bar in zip(radii, bars, strict=True):
    bar.set_facecolor(jet(r / 10.0))
    bar.set_alpha(0.5)

ax.set_xticklabels([])
ax.set_yticklabels([])
plt.show()