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Título: | Emphasizing Difficulties in the Detection of Rhythms with Lomb-Scargle Periodograms |
Autor: | Schimmel, Martin CSIC ORCID | Palabras clave: | Lomb-Scargle periodogram Rhythm detection Outlying measures Non-sinusoidal signals |
Fecha de publicación: | jul-2001 | Editor: | Swets & Zeitlinger | Citación: | Biological Rhythm Research 32(3): 341-345(2001) | Resumen: | The Lomb-Scargle periodogram was introduced in astrophysics to detect sinusoidal signals in noisy unevenly sampled time series. It proved to be a powerful tool in time series analysis and has recently been adapted in biomedical sciences. Its use is motivated by handling non-uniform data which is a common characteristic due to the restricted and irregular observations of, for instance, free-living animals. However, the observational data often contain fractions of non-Gaussian noise or may consist of periodic signals with non-sinusoidal shapes. These properties can make more difficult the interpretation of Lomb-Scargle periodograms and can lead to misleading estimates. In this letter we illustrate these difficulties for noise-free bimodal rhythms and sinusoidal signals with outliers. The examples are aimed to emphasize limitations and to complement the recent discussion on Lomb-Scargle periodograms. | Versión del editor: | http://www.informaworld.com/smpp/content~db=all~content=a714014256 | URI: | http://hdl.handle.net/10261/19859 | DOI: | 10.1076/brhm.32.3.341.1340 | ISSN: | 0929-1016 |
Aparece en las colecciones: | (Geo3Bcn) Artículos |
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