Davies boulden's results and avg. within centroid distance's results

20152280942015228094 Member Posts: 3 Contributor I
edited December 2018 in Help

Hello , I want to ask about davies boulden's  results and  avg. within centroid distance's results,  I did a cluster with k-mean  with loop of k start from 2 to 25, so I use davies boulden   and  avg. within centroid distance  to evaluate  results, so the final result shows that davies boulden is infinity and avg. within centroid distance is zero  when k = 4 and above , so I what I need to do ? remove results from k and above or there is an error and I can fix it?

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Answers

  • lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, Member Posts: 683   Unicorn

    Hi @2015228094,

     

    I don't know how to interpret these values of Davies Bouldin Index and avg. within centroid distance.

    However, if you are searching an optimum value of k for your clustering task, you can explore an other track : 

    Use the X-Means operator which determine the optimum number of clusters k based on the Bayesian Information Criterion (BIC).

     

    I hope it helps,

     

    Regards, 

     

    Lionel

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