  Time series are collected and studied extensively for the knowledge about the
data source characteristics such as the trend or the spectral landscape. Some
peaks in the spectral landscape correspond to dominant frequencies. The
approach here is empirical: all time series are discrete and finite. Contents:
Introduction. 1 Examples of periodic phenomena. 2 Algorithms and libraries. 3
Time series analysis. 4 Dominant frequency in ladar data. Conclusion.
References.
