Divergences or similarity measures between probability distributions have become a very useful tool for studying different aspects of statistical objects, such as time series, networks, and images. Notably, not every divergence provides identical results when applied to the same problem. Therefore, it seems convenient to have the widest possible set of divergences to be applied to the problems under study. Besides this choice, an essential step in the analysis of every statistical object is the mapping of each one of their representing values into an alphabet of symbols conveniently chosen. In this work, we choose the family of divergences known as the Burbea–Rao centroids (BRCs). For the mapping of the original time series into a symbolic sequence, we work with the ordinal pattern scheme. We apply our proposals to analyze simulated and real time series and to real textured images. The main conclusion of our work is that the best BRC, at least in the studied cases, is the Jensen–Shannon divergence, besides the fact that it verifies some interesting formal properties.
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March 2023
Research Article|
March 27 2023
Rao–Burbea centroids applied to the statistical characterization of time series and images through ordinal patterns
Special Collection:
Ordinal Methods: Concepts, Applications, New Developments and Challenges
Diego M. Mateos
;
Diego M. Mateos
a)
(Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
, Buenos Aires C1425FQB, Argentina
2
Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos (UADER)
, Oro Verde, Entre Ríos 3100, Argentina
3
Instituto de Matemática Aplicada del Litoral (IMAL-CONICET-UNL), CCT CONICET
, Santa Fé 3000, Argentina
a)Author to whom correspondence should be addressed: mateosdiego@gmail.com
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Leonardo E. Riveaud;
Leonardo E. Riveaud
(Conceptualization, Formal analysis, Investigation, Methodology)
4
Facultad de Ingeniería, Universidad Nacional del Comahue (FAIN UNComa)
, Neuquén Q8300, Argentina
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Pedro W. Lamberti
Pedro W. Lamberti
(Conceptualization, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
1
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
, Buenos Aires C1425FQB, Argentina
5
Facultad de Matemática Astronomía, Física y Computación (FaMAF), Universidad Nacional de Córdoba
, Córdoba 5000, Argentina
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a)Author to whom correspondence should be addressed: mateosdiego@gmail.com
Note: This paper is part of the Focus Issue on Ordinal Methods: Concepts, Applications, New Developments and Challenges.
Chaos 33, 033144 (2023)
Article history
Received:
November 24 2022
Accepted:
March 02 2023
Citation
Diego M. Mateos, Leonardo E. Riveaud, Pedro W. Lamberti; Rao–Burbea centroids applied to the statistical characterization of time series and images through ordinal patterns. Chaos 1 March 2023; 33 (3): 033144. https://doi.org/10.1063/5.0136240
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