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COI

Computation of the cone of influence

Description

Wavelet transformation of a time series includes padding with zeros at the edges. This function determines the spectrum borders influenced by edge effects.

This code has been developed by Huidong Tian (archived R package WaveletCo).

Usage

COI(start = start, dt = dt, nc = nc, nr = nr, Period = Period)

Arguments

start

starting point in time. Default: start = 1.
dt

time resolution, i.e. sampling resolution in the time domain, 1/dt = number of observations per time unit
nc

number of columns = number of observations = number of observation epochs; "epoch" meaning point in time
nr

number of rows = number of scales (Fourier periods)
Period

the Fourier periods (measured in time units determined by dt)

Value

a list with the following elements:

x, y : coordinates of the cone of influence
axis.1 : tick levels corresponding to the time steps
used for wavelet transformation:
1, 1+dt, 1+2dt, ... if start = 1
axis.2 : tick levels corresponding to the log of Fourier periods:
log2(Period)

Author(s)

Code developed by Huidong Tian.

References

Tian, H., and Cazelles, B., 2012. WaveletCo. Available at https://cran.r-project.org/src/contrib/Archive/WaveletCo/, archived April 2013; accessed July 26, 2013.

See Also

WaveletComp

Computational Wavelet Analysis

v1.1
GPL-2
Authors
Angi Roesch <angi@angi-stat.com> and Harald Schmidbauer <harald@hs-stat.com>
Initial release
2018-03-18

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