如何将轮廓分数添加到列表

2024-05-15 • 问答

我想在循环中将轮廓分数添加到列表中。

        from sklearn.cluster import KMeans
        from sklearn.metrics import silhouette_score

        ks = range(1,11) # for 1 to 10 clusters
        #sse = []
        sil = []

        for k in ks:
             # Create a KMeans instance with k clusters: model
             kmeans = KMeans(n_clusters = k)
             # Fit model to samples
             #kmeans.fit(X)
             cluster_labels = kmeans.fit_predict(X) #X is dataset that preprocess already.
             silhouette = silhouette_score(X,cluster_labels)


             # Append the inertia to the list of inertias
             #sse.append(kmeans.inertia_)

             #Append silhouette to the list
             sil.append(silhouette)

但是，当我用Silhouette_score设置轮廓时，在第21行出现以下错误

       ValueError                   Traceback (most recent call last)
       <ipython-input-12-2570ccf62502> in <module>()
       18     #kmeans.fit(X)
       19     cluster_labels = kmeans.fit_predict(X)
   --->20     silhouette = silhouette_score(X,cluster_labels)
       21 
       22

这是全部代码还是部分代码？如果在此之前没有代码，则很明显在分配之前没有定义或使用X。

因此，将行放在您分配X的位置，一切都会正常进行。

否则，请将完整的跟踪信息添加到错误中

from sklearn.datasets import make_blobs
from sklearn.cluster import KMeans
from sklearn.metrics import silhouette_samples,silhouette_score
  
X,y = make_blobs(n_samples=500,n_features=2,centers=4,cluster_std=1,center_box=(-10.0,10.0),shuffle=True,random_state=1) 
sil=[]
#start the cluster range from 2
range_n_clusters = range(2,10)

for n_clusters in range_n_clusters:
    clusterer = KMeans(n_clusters=n_clusters,random_state=10)
    cluster_labels = clusterer.fit_predict(X)
    silhouette_avg = silhouette_score(X,cluster_labels)
    print("For n_clusters =",n_clusters,"The average silhouette_score is :",silhouette_avg)
    sil.append(silhouette_avg)

这是将Kmeans聚类应用于随机样本并根据轮廓分数找到最佳聚类的示例。我认为这会为您提供帮助或提供更多信息

如何将轮廓分数添加到列表

jinjbnu 回答：如何将轮廓分数添加到列表

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