散點圖--python庫--matpolitlib

import  matplotlib.pyplot as plt
import numpy as np

n = 1024
X = np.random.normal(0,1,n)#是生成的數平均值是0，方差是1
Y  = np.random.normal(0,1,n)
T = np.arctan2(Y,X)#顏色


plt.scatter(X,Y,s = 75,c = T,alpha=0.5)
plt.xlim(-1.5,1.5)
plt.ylim(-1.5,1.5)
plt.xticks(())
plt.yticks(())


plt.show()