Calculates the spectrogram of a signal
Calculates the spectrogram of the heart rate signal after filtering and interpolation in a window of a certain size
CalculateSpectrogram(HRVData, size, shift, sizesp = 1024, verbose=NULL)
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 calculating spectrogram (zero padding) |
verbose |
Deprecated argument maintained for compatibility, use SetVerbose() instead |
Returns the spectrogram of the heart rate signal
An example including all the necessary steps to obtain the spectrogram
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", verbose = TRUE)
##Calculating heart rate signal:
md = BuildNIHR(md)
##Filtering heart rate signal:
md = FilterNIHR(md)
##Interpolating heart rate signal:
md = InterpolateNIHR(md)
##Calculating spectrogram:
CalculateSpectrogram(md, size = 120, shift = 10, sizesp = 1024)
M. Lado, A. Mendez, D. Olivieri, L. Rodriguez, X. Vila
L. Rodriguez-Linares, A. Mendez, M. Lado, D. Olivieri, X. Vila, I. Gomez-Conde, "An open source tool for heart rate variability spectral analysis", Computer Methods and Programs in Biomedicine 103, 39-50, doi:10.1016/j.cmpb.2010.05.012 (2011)
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