Cluster Quality or Cluster Validation

[xihajun]

How to say the result is good? It needs to introduce some metics to evaluate the quality of a cluster

[xihajun]

• A Good One From Stanford
  • this tells me that the cluster quality should be divided by supervised and unsupervised
• A Good Clustering Quality Measure
• Clustering Evaluation strategies

[xihajun]

Different cluster evaluators

There are several indices for predicting optimal clusters –

• Silhouette Index
  • 似乎要把所有距离算出来，是不是算法复杂度比较高
• Dunn Index
• DB Index
• CS Index
• I- Index
• XB or Xie Beni Index https://www.geeksforgeeks.org/silhouette-index-cluster-validity-index-set-2/

  Model evaluators

• AIC
• BIC