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Last data update: 2014.03.03

R: Calculates and Plots spectrogram

PlotSpectrogram

R Documentation

Calculates and Plots spectrogram

Description

Plots spectrogram of the heart rate signal as calculated by CalculateSpectrogram() function

Usage

PlotSpectrogram(HRVData, size, shift, sizesp=NULL, freqRange = NULL, 
                scale="linear", verbose=NULL)

Arguments

`HRVData`	Data structure that stores the beats register and information related to it
`size`	Size of window for calculating spectrogram (seconds)
`shift`	Displacement of window for calculating spectrogram (seconds)
`sizesp`	Points for calculation (zero padding). If the user does not specify it, the function estimates a propper value.
`freqRange`	Vector with two components specifying the frequency range that the program should plot. If the user does not specify it, the function uses the whole frequency range.
`scale`	Scale used to plot spectrogram, linear or logarithmic
`verbose`	Deprecated argument maintained for compatibility, use SetVerbose() instead

Note

An example including all the necessary steps to obtain the power
bands of a wfdb register is giving below:

##Reading a wfdb register and storing into a data structure:
md = CreateHRVData(Verbose = TRUE)
md = LoadBeatWFDB(md, RecordName = "register_name",
RecordPath = "register_path")

##Calculating heart rate signal:
md = BuildNIHR(md)

##Filtering heart rate signal:
md = FilterNIHR(md)

##Interpolating heart rate signal:
md = InterpolateNIHR(md)

##Calculating and Plotting Spectrogram
PlotSpectrogram(md, size = 120, shift = 10, sizesp = 1024)

Author(s)

M. Lado, A. Mendez, D. Olivieri, L. Rodriguez, X. Vila

References

L. Rodriguez-Linares, X. Vila, A. Mendez, M. Lado, D. Olivieri, "RHRV: An R-based software package for heart rate variability analysis of ECG recordings," 3rd Iberian Conference in Systems and Information Technologies (CISTI 2008), Proceedings I, 565-573, ISBN: 978-84-612-4476-8 (2008)