This function returns the analytic signal of a time wave through Hilbert transform.
an R object.
sampling frequency of
The analytic signal is useful to get the amplitude envelope
oscillo and the instantaneous
phase or frequency (see
ifreq) of a time wave.
hilbert returns the analytic signal as a complex matrix.
The imaginary part of this matrix is the Hilbert transform.
To get the Hilbert component only, use
Jonathan Lees email@example.com. Implementation of 'fftw' argument by Jean Marchal and Francois Fabianek.
Mbu Nyamsi, R. G., Aubin, T. & Bremond, J. C. 1994 On the extraction of some time dependent parameters of an acoustic signal by means of the analytic signal concept. Its application to animal sound study. Bioacoustics, 5: 187-203.
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