EvolutiveFFT


  Fourier transform input parameters
  <ul>
<li>ft$nfft  The frequency resolution, should be in powers of 2
      </li>
<li>ft$ns  Number of samples in a window
      </li>
<li>ft$nov  Number of samples to overlap, must be less than <code>ft$ns</code></li>
</ul><p></p><p></p>

freq.span

taper


Generates the evolutive Fourier spectrogram of a signal, and returns it for use in <code><a rd-options="" href="/link/FTGramImage?package=hht&version=2.1.3" data-mini-rdoc="hht::FTGramImage">FTGramImage</a></code>.


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) and the complete ensemble empirical mode decomposition (CEEMD) methods 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.

EvolutiveFFT: Calculate the evolutive Fourier spectrogram.

Description

Usage

Arguments

Value

Details

References