08Scatter散点图

import matplotlib.pyplot as plt
import numpy as np

n=1024
X = np.random.normal(0,1,n)
Y = np.random.normal(0,1,n)
T = np.arctan2(Y,X)#for color value

plt.scatter(X,Y,s=75,c=T,alpha=0.5)#alpha(透明度)

plt.xlim((-1.5,1.5))
plt.ylim((-1.5,1.5))


plt.show()