Abstract
Time series representation can be approached by segmentation genetic algorithms (GAs) with the purpose of automatically finding segments approximating the time series with the lowest possible error. Although this is an interesting data mining field, obtaining the optimal segmentation of time series in different scopes is a very challenging task. In this way, very accurate algorithms are needed. On the other hand, it is well-known that GAs are relatively poor when finding the precise optimum solution in the region where they converge. Thus, this paper presents a hybrid GA algorithm including a local search method, aimed to improve the quality of the final solution. The local search algorithm is based on two well-known algorithms: Bottom-Up and Top-Down. A real-world time series in the Spanish Stock Market field (IBEX35) and a synthetic database (Donoho-Johnstone) used in other researches were used to test the proposed methodology.
This work has been subsidized by the project TIN2014-54583-C2-1-R of the Spanish Ministerial Commission of Science and Technology (MICYT), FEDER funds and the P11-TIC-7508 project of the Junta de Andalucía (Spain). Antonio M. Durán-Rosal’s research has been subsidized by the FPU Predoctoral Program (Spanish Ministry of Education and Science), grant reference FPU14/03039.
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Notes
- 1.
The corresponding values can be downloaded at https://es.finance.yahoo.com/.
- 2.
The time series can be downloaded at https://sites.google.com/site/icdmmdl/.
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Durán-Rosal, A.M., Gutiérrez-Peña, P.A., Martínez-Estudillo, F.J., Hervás-Martínez, C. (2016). Time Series Representation by a Novel Hybrid Segmentation Algorithm. In: Martínez-Álvarez, F., Troncoso, A., Quintián, H., Corchado, E. (eds) Hybrid Artificial Intelligent Systems. HAIS 2016. Lecture Notes in Computer Science(), vol 9648. Springer, Cham. https://doi.org/10.1007/978-3-319-32034-2_14
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