Hierarchical Qualitative Clustering – clustering mixed datasets with critical qualitative information
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Clustering can be used to extract insights from data or to verify some of the assumptions held by the domain experts, namely data segmentation. In the literature, few methods can be applied in clustering qualitative values using the context associated with other variables present in the data, without losing interpretability. Moreover, the metrics for calculating dissimilarity between qualitative values often scale poorly for high dimensional mixed datasets. In this study, we propose a novel method for clustering qualitative values, based on Hierarchical Clustering, and using Maximum Mean Discrepancy. The method maintains the original interpretability of the qualitative information present in the dataset. Using a mixed dataset provided by Spotify, we showcase how to our method can be used for clustering music artists based on quantitative features of thousands of songs.
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