Python matplotlib绘制极坐标图-演道网

1、极坐标散点图

N = 150
r = 2 * np.random.rand(N)
theta = 2 * np.pi * np.random.rand(N)
area = 200 * r**2
colors = theta

ax = plt.subplot(111, projection=’polar’)
c = ax.scatter(theta, r, c=colors, s=area, cmap=’hsv’, alpha=0.65)

plt.show()

绘制结果如下：

2、极坐标饼状图

import numpy as np
import matplotlib.pyplot as plt

# 计算饼图
N = 20
theta = np.linspace(0.0, 3 * np.pi, N, endpoint=False)
radii = 10 * np.random.rand(N)
width = np.pi / 4 * np.random.rand(N)

ax = plt.subplot(111, projection=’polar’)
bars = ax.bar(theta, radii, width=width, bottom=0.0)

# 使用自定义颜色和不透明度
for r, bar in zip(radii, bars):
    bar.set_facecolor(plt.cm.viridis(r / 10.))
    bar.set_alpha(0.6)

plt.show()

绘制结果如下：

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