Scikit-learn的kmeans聚类

Posted 2020-10-31 静悟生慧

1. 生成随机的二维数据：

import numpy as np  
x1 = np.array([1, 2, 3, 1, 5, 6, 5, 5, 6, 7, 8, 9, 9])  
x2 = np.array([1, 3, 2, 2, 8, 6, 7, 6, 7, 1, 2, 1, 3])  
x = np.array(list(zip(x1, x2))).reshape(len(x1), 2) #先将x1和x2用zip组合，然后再转换成list，最后reshape

print (x)

　　

2.生成聚类标签：

from sklearn.cluster import KMeans  
kmeans=KMeans(n_clusters=3)   #n_clusters:number of cluster  
kmeans.fit(x)  
print (kmeans.labels_)

　　

3.显示聚类效果：

import matplotlib.pyplot as plt  
plt.figure(figsize=(5,5))  
colors = [\'b\', \'g\', \'r\']  
markers = [\'o\', \'s\', \'D\']  
for i,l in enumerate(kmeans.labels_):  
     plt.plot(x1[i],x2[i],color=colors[l],marker=markers[l],ls=\'None\')  
plt.show() 

　　

参考： https://blog.csdn.net/qq_34264472/article/details/53217748  （此为python2代码）