Description

The Lomb-Scargle periodogram is the most wideley used method to detect even weak periodoc components in unequally sampled time series. It can also be used for equally sampled time series.

Details

Function lsp computes the Lomb-Scargle periodogram for unevenly sampled times series (e.g., series with missing data). P-values for the highest peak in the periodogram are computed from the exponential distribution. Alternatively, function randlsp computes a p-value for the largest peak in the periodogram by repeatedly randomising the time-series sequence. Both functions allow setting the range of frequencies to be inspected, as well as the stepsize (oversampling factor) used for frequency scanning.

Author(s)

Thomas Ruf
Department of Integrative Biology and Evolution,
University of Veterinary Medicine, Vienna, Austria
Maintainer: Thomas Ruf thomas.ruf@vetmeduni.ac.at

References

Ruf, T. (1999) The Lomb-Scargle Periodogram in Biological Rhythm Research: Analysis of Incomplete and Unequally Spaced Time-Series. Biological Rhythm Research 30: 178–201

Examples