A strategy for interpreting and visualizing the results of matrix-trifactorization-based coclustering algorithms

  • Ais B. R. Castro Universidade de São Paulo
  • Sarajane M. Peres Universidade de São Paulo
  • Waldyr L. de Freitas Junior Universidade de São Paulo
  • Paulo Pirozelli Universidade de São Paulo
  • Fábio G. Cozman Universidade de São Paulo
  • Anarosa A. F. Brandão Universidade de São Paulo

Resumo


Information yielded by unsupervised learning is often hard to interpret due to the lack of defined labels. To overcome this, we propose and illustrate a strategy for interpreting and visualizing the results of coclustering algorithms based on trifactorization. Our method consists of three steps: (1) vector space visualization; (2) cluster characterization by top documents/words; and (3) cocluster characterization by comparing top words between different clusters. The latter allows exploring the resulting clusters in a way which considers the relationship between attribute cluster and data cluster for every data cluster, instead of just the data cluster with the highest association with this attribute cluster. We illustrate the use of our method for the Non-negative Block Value Decomposition on a dataset of scientific abstracts.

Palavras-chave: coclustering, clustering, matrix factorization, NBVD

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Publicado
25/09/2023
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CASTRO, Ais B. R.; PERES, Sarajane M.; FREITAS JUNIOR, Waldyr L. de; PIROZELLI, Paulo; COZMAN, Fábio G.; BRANDÃO, Anarosa A. F.. A strategy for interpreting and visualizing the results of matrix-trifactorization-based coclustering algorithms. In: ENCONTRO NACIONAL DE INTELIGÊNCIA ARTIFICIAL E COMPUTACIONAL (ENIAC), 20. , 2023, Belo Horizonte/MG. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2023 . p. 839-853. ISSN 2763-9061. DOI: https://doi.org/10.5753/eniac.2023.234492.

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