InstantaneousFrequency

Analytic signal produced by <code><a href="/link/HilbertTransform?package=hht&version=2.0.1" rd-options="" data-mini-rdoc="hht::HilbertTransform">HilbertTransform</a></code>

asig

How the instantaneous frequency is calculated. 
<code>"arctan"</code> uses the arctangent of the real and imaginary parts of the Hilbert transform, taking the numerical derivative of phase for frequency.
<code>"chain"</code> uses the analytical derivative

method

Differentiation lag, see the <code>diff</code> function in the <code>base</code> package.

Calculates instantaneous frequency from an analytic signal.

This package builds on the EMD package to provide additional tools for empirical mode decomposition (EMD) and Hilbert spectral analysis. It also implements the ensemble empirical decomposition (EEMD) method to avoid mode mixing and intermittency problems found in EMD analysis.  The package comes with several plotting methods that can be used to view intrinsic mode functions, the HHT spectrum, and the Fourier spectrum. To see the version history and download the bleeding-edge version (at your own risk!), see the project website at code.google.com below.  See the other links for PDF files describing numerical and exact analytical methods for determining instantaneous frequency, some examples of signals processed with this package, and some examples of the Ensemble Empirical Mode Decomposition method. 

InstantaneousFrequency: Derive instantaneous frequency

Description

Usage

Arguments

Value

See Also