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Evaluate a cosine-measure Clustering by Davies Bouldin

siamak_wantsiamak_want Member Posts: 98 Contributor II
edited July 2019 in Help
Hi all,

I am running a process which contains a k-means operator with "cosine similarity measure". and I want to evaluate it with a "cluster distance performance" operator with "Davies Bouldin" measure. As far as I know, the Davies bouldin measure is calculated by "Eucledian distance" measure, But my cluster model has been built upon a "cosine similarity measure". SO how can I evaluate a cosine-based k-means? Any idea please?

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Answers

  • siamak_wantsiamak_want Member Posts: 98 Contributor II
    Any explanation or idea please?
  • awchisholmawchisholm RapidMiner Certified Expert, Member Posts: 458   Unicorn
    Hello

    I had a look at the code. I think it's this source file: CentroidBasedEvaluator.java
    private double getDaviesBouldin(CentroidClusterModel model, ExampleSet exampleSet) throws OperatorException {
    DistanceMeasure measure = new EuclideanDistance();
    I think you would have to write some Java to change how it works.

    regards

    Andrew
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