matplotlib - 极坐标上的散点图

• 极坐标上的散点图
  
• 代码

# -*- coding: utf-8 -*-

"""
Created on Fri Nov 16 20:07:14 2018
@author: LU
"""

import numpy as np
import matplotlib.pyplot as plt

np.random.seed(19680801)  # 随机数种子

N = 150
r = 2*np.random.rand(N)  # 2x，1行N列
theta = 2*np.pi*np.random.rand(N)  #2*pi*x
area = 200*r**2
colors = theta

fig = plt.figure()
ax = fig.add_subplot(111, projection='polar')  #画布分割为1行1列，图像为从左到右从上到下数的第1块
c = ax.scatter(theta, r, c=colors, s=area, cmap='hsv', alpha=0.75)

• 参考
  o. https://matplotlib.org/gallery/pie_and_polar_charts/polar_scatter.html#sphx-glr-gallery-pie-and-polar-charts-polar-scatter-py
  o. https://blog.youkuaiyun.com/anneqiqi/article/details/64125186