fftsurrog: Surrogate time series using Fourier surrogates
In wsyn: Wavelet Approaches to Studies of Synchrony in Ecology and Other Fields

Description Usage Arguments Value Note Author(s) References

Creates surrogate time series using Fourier surrogates

1	fftsurrog(dat, nsurrogs, syncpres)

`dat`	A locations x time matrix of observations
`nsurrogs`	The number of surrogates to produce
`syncpres`	Logical. TRUE for "synchrony preserving" surrogates (same phase randomizations used for all time series). FALSE leads to independent phase randomizations for all time series.

fftsurrog returns a list of nsurrogs surrogate datasets

For internal use, no error checking

Jonathan Walter, jaw3es@virginia.edu; Lawrence Sheppard, lwsheppard@ku.edu; Daniel Reuman, reuman@ku.edu

Sheppard, LW, et al. (2016) Changes in large-scale climate alter spatial synchrony of aphid pests. Nature Climate Change. DOI: 10.1038/nclimate2881

Schreiber, T and Schmitz, A (2000) Surrogate time series. Physica D 142, 346-382.

Prichard, D and Theiler, J (1994) Generating surrogate data for time series with several simultaneously measured variables. Physical Review Letters 73, 951-954.

wsyn documentation built on June 19, 2021, 1:07 a.m.