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A data set might have a well-defined structure, but this does not necessarily lead to good clustering results. If the structure is hidden in an unfavourable scaling, clustering will usually fail. The aim of this work is to present techniques—DipScaling and DipTransformation—which enhance the data set by rescaling and transforming its features and thus emphasizing and accentuating its structure. If the structure is sufficiently clear, clustering algorithms will perform far better. We refer to such techniques as “Dataset-Transformations” and try to provide a mathematical framework for them. To show that our algorithms work well, we have conducted extensive experiments on several real-world data sets, where we improve clustering not only for k -means, which is our main focus but also for other standard clustering approaches.

Dataset-Transformation: improving clustering by enhancing the structure with DipScaling and DipTransformation