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Unifying data units and models in (co-)clustering

Author

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  • Christophe Biernacki

    (Inria and CNRS)

  • Alexandre Lourme

    (University of Bordeaux)

Abstract

Statisticians are already aware that any task (exploration, prediction) involving a modeling process is largely dependent on the measurement units for the data, to the extent that it should be impossible to provide a statistical outcome without specifying the couple (unit,model). In this work, this general principle is formalized with a particular focus on model-based clustering and co-clustering in the case of possibly mixed data types (continuous and/or categorical and/or counting features), and this opportunity is used to revisit what the related data units are. Such a formalization allows us to raise three important spots: (i) the couple (unit,model) is not identifiable so that different interpretations unit/model of the same whole modeling process are always possible; (ii) combining different “classical” units with different “classical” models should be an interesting opportunity for a cheap, wide and meaningful expansion of the whole modeling process family designed by the couple (unit,model); (iii) if necessary, this couple, up to the non-identifiability property, could be selected by any traditional model selection criterion. Some experiments on real data sets illustrate in detail practical benefits arising from the previous three spots.

Suggested Citation

  • Christophe Biernacki & Alexandre Lourme, 2019. "Unifying data units and models in (co-)clustering," Advances in Data Analysis and Classification, Springer;German Classification Society - Gesellschaft für Klassifikation (GfKl);Japanese Classification Society (JCS);Classification and Data Analysis Group of the Italian Statistical Society (CLADAG);International Federation of Classification Societies (IFCS), vol. 13(1), pages 7-31, March.
    • Handle: RePEc:spr:advdac:v:13:y:2019:i:1:d:10.1007_s11634-018-0325-2
    DOI: 10.1007/s11634-018-0325-2
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    References listed on IDEAS

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    Cited by:

    1. Sanjeena Subedi & Paul D. McNicholas, 2021. "A Variational Approximations-DIC Rubric for Parameter Estimation and Mixture Model Selection Within a Family Setting," Journal of Classification, Springer;The Classification Society, vol. 38(1), pages 89-108, April.
    2. Selosse, Margot & Jacques, Julien & Biernacki, Christophe, 2020. "Model-based co-clustering for mixed type data," Computational Statistics & Data Analysis, Elsevier, vol. 144(C).

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