Phase-phase 2D plot of a time wave
This functions returns a 2D representation of a time wave against a delayed version of itself.
phaseplot2(wave, f, channel = 1, tau = 1, type = "l",
xlab = "x(t)",
ylab = paste("x(t+", tau, ")", sep = ""), ...)wave |
an R object. |
f |
sampling frequency of |
channel |
channel of the R object, by default left channel (1). |
tau |
the time delay to apply in number of samples. |
type |
type of plot that should be drawn. See |
xlab |
title of the x axis. |
ylab |
title of the y axis. |
... |
other |
The principle consists in displaying in a single x-y graph the
original time wave with a delayed version of itself. The delay is
controlled with the argument tau that needs to be specified in
number of samples. The conversion of tau in second is obtained by calculating
tau/f, with f the sampling frequency.
Nothing is returned except an x-y plot.
Phase-phase plot can be used to test non-linearity.
Jerome Sueur
Kantz H, Schreiber T (2003) Non linear time series analysis. Cambridge University Press.
s <- synth(d=0.05, f=44100, cf=440, out="Wave") n <- noisew(d=0.05, f=44100, out="Wave") par(mfrow=c(2,1)) phaseplot2(s) phaseplot2(n)
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