HHSpectrum: Generate Hilbert spectrum

In hht: The Hilbert-Huang Transform: Tools and Methods

Generate Hilbert spectrum

Description

Generates a Hilbert periodogram from the results of Sig2IMF and EEMD.

Usage

HHSpectrum(hres, dfreq, freq.span = NULL, time.span = NULL, 
    scaling = "none", verbose = TRUE)

Arguments

hres	This is the output generated by EEMDCompile or EEMDResift
dfreq	Frequency resolution of spectrum
time.span	Time span to render spectrum over; NULL means over the whole time series
freq.span	Frequency span to include in spectrum; NULL means render all the frequencies in the time series
scaling	If "log", render a log10 frequency spectrum. Defaults to "none" (linear).
verbose	If TRUE, print progress messages

Details

HHSpectrum sums Hilbert spectral data over the time domain to produce the equivalent of a periodogram. The result can be plotted using HHSpecPlot.

Value

hspec

A data structure containing the spectrum of each IMF.

Author(s)

Daniel Bowman [e-mail]

See Also

HHRender, HHSpecPlot

Examples

## Not run: 
data(PortFosterEvent)

emd.result <- Sig2IMF(sig, tt)

dfreq <- 0.1
hspec <- HHSpectrum(emd.result, dfreq)
HHSpecPlot(hspec, show.fourier = TRUE, scale.fourier = TRUE)


## End(Not run)

hht documentation built on March 31, 2023, 10:08 p.m.