Calculates the spectrogram bands in normalized units
Data structure that stores the beats register and information related to it
Reference to the data structure that contains the spectrogram analysis
Logical value. If TRUE (default), the function normalizes LF and HF power series by its sum. If FALSE, the function computes VLF, LF and HF power series by its sum.
The default behaviour of this function computes the normalized power time series in the LF and HF bands following the Task Force recommendations:
normalized_LF = LF_power / (total_power - VLF_power - ULF_power)
normalized_HF = HF_power / (total_power - VLF_power -ULF-power)
If VLFnormalization is set to FALSE, the functions computes:
normalized_VLF = VLF_power / (total_power - ULF_power)
normalized_LF = LF_power / (total_power - ULF_power)
normalized_HF = HF_power / (total_power - ULF_power)
The resulting time series are returned in a list. Note that before using this function, the spectrogram should be computed with the CalculatePowerBand function.
The getNormSpectralUnits returns a list storing the resulting normalized power-band series. Note that this list is not stored in the HRVData structure.
Camm, A. J., et al. "Heart rate variability: standards of measurement, physiological interpretation and clinical use. Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology." Circulation 93.5 (1996): 1043-1065.
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## Not run: # load some data... data(HRVProcessedData) hd = HRVProcessedData # Perform some spectral analysis and normalize the results hd = CreateFreqAnalysis(hd) hd = CalculatePowerBand(hd,indexFreqAnalysis = 1,shift=30,size=60) normUnits = getNormSpectralUnits(hd) # plot the normalized time series par(mfrow=c(2,1)) plot(normUnits$Time, normUnits$LF, xlab="Time", ylab="normalized LF", main="normalized LF",type="l") plot(normUnits$Time, normUnits$HF, xlab="Time", ylab="normalized HF", main="normalized HF",type="l") par(mfrow=c(1,1)) ## End(Not run)
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