chentao106 opened a new pull request #122: Implement the Calinski-Harabasz Evaluator algorithm for Cluster URL: https://github.com/apache/commons-math/pull/122 "Calinsk-iHarabasz" is the most popular evaluator for Centriod Clusters. This is a java version of "Calinsk-iHarabasz" reference the sklearn version. https://scikit-learn.org/stable/modules/generated/sklearn.metrics.calinski_harabasz_score.html https://www.tandfonline.com/doi/abs/10.1080/03610927408827101
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