This function returns the frequency coherence between two time waves.
coh(wave1, wave2, f, channel=c(1,1), plot =TRUE, xlab = "Frequency (kHz)",
ylab = "Coherence", xlim = c(0,f/2000), type = "l",...)When plot is FALSE, this coh returns a two-column matrix, the
first column being the frequency axis in kHz (x-axis) and the second column being the coherence (y-axis).
a first R object.
a second R object.
sampling frequency of wave (in Hz). Does not need to
be specified if embedded in wave.
channel of the R objects, by default left channel (1) for each object.
logical, if TRUE plots the continuous coherence function
(by default TRUE).
title of the frequency X-axis.
title of the coherence Y-axis.
range of frequency X-axis.
if plot is TRUE, type of plot that should be drawn.
See plot for details (by default "l" for lines).
other plot graphical parameters.
Jerome Sueur sueur@mnhn.fr but this function
is based on spec.pgram
by Martyn Plummer, Adrian Trapletti and B.D. Ripley.
Coherence is a frequency domain function computed to show the degree of a relationship between two signals. The value of the coherence function ranges between zero and one, where a value of zero indicates there is no causal relationship between the signals. A value of one indicates the existence of linear frequency response between the two signals. This can be used, for instance, to compare the input and output signals of a system.
ccoh, spectro, spec.pgram.
wave1<-synth(d=1,f=4000,cf=500)
wave2<-synth(d=1,f=4000,cf=800)
coh(wave1,wave2,f=4000)
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