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• W2026792000 abstract "• We propose an innovative hybrid method for clustering categorical sequential data. • The algorithm combines model-based and hierarchical clustering approach. • We are able to cluster sequences without losing information about their dynamics. • In the first application the method detects 2 distinct web users search patterns. • In the second application the method recovers 5 clusters with diverse job careers. The identification of different dynamics in sequential data has become an every day need in scientific fields such as marketing, bioinformatics, finance, or social sciences. Contrary to cross-sectional or static data, this type of observations (also known as stream data, temporal data, longitudinal data or repeated measures) are more challenging as one has to incorporate data dependency in the clustering process. In this research we focus on clustering categorical sequences. The method proposed here combines model-based and heuristic clustering. In the first step, the categorical sequences are transformed by an extension of the hidden Markov model into a probabilistic space, where a symmetric Kullback–Leibler distance can operate. Then, in the second step, using hierarchical clustering on the matrix of distances, the sequences can be clustered. This paper illustrates the enormous potential of this type of hybrid approach using a synthetic data set as well as the well-known Microsoft dataset with website users search patterns and a survey on job career dynamics." @default.
• W2026792000 created "2016-06-24" @default.
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• W2026792000 date "2014-05-01" @default.
• W2026792000 modified "2023-09-24" @default.
• W2026792000 title "Mining categorical sequences from data using a hybrid clustering method" @default.
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• W2026792000 doi "https://doi.org/10.1016/j.ejor.2013.11.002" @default.
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