python matplotlib绘图/sklearn包--make

1.make_bolbs() 函数

from sklearn.datasets.samples_generator import make_blobs

import numpy as np

import matplotlib.pyplot as plt

X , y = make_blobs(n_samples=1000 , n_features= 2 ,centers=[[-1,-1],[0,0],[1,1],[2,2]],cluster_std=[0.4,0.3,0.3,0.4],random_state=1)

其中：

plt.scatter(X[:,0],X[:,1],c = 'red')

plt.show()

plt.scatter(X[:,0],X[:,1],c = y)     # y是整数数组，代表每个点的颜色，长度为点个数

plt.show()

巴特西