用matplotlib绘制散点图（scatter）

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0,1,20)
y = np.sin(x)
z = np.cos(x)
size = tuple(i*300 for i in y)
color = np.random.rand(20)

fig, ax = plt.subplots()
ax.scatter(x,y,color='r',s=size,alpha=0.6)
ax.scatter(x,z,c=color,s=size,linewidth=0,marker='X')

plt.show()