CalculateSpectrogram {RHRV}R Documentation

Calculates the spectrogram of a signal

Description

Calculates the spectrogram of the heart rate signal after filtering and interpolation in a window of a certain size

Usage

CalculateSpectrogram(Data, size, shift, sizesp = 1024, verbose = FALSE)

Arguments

Data Data structure that stores the beats register and all the information obtained from it
size Size of window for calculating spectrogram (seconds)
shift Displacement of window for calculating spectrogram (seconds)
sizesp Seconds for calculating spectrogram (zero padding)
verbose Boolean argument that allows to specify if the function returns additional information

Value

Returns Data, the structure that contains beat positions register, associated heart rate instantaneous values also, filtered heart rate signal equally spaced, and spectrogram of the heart rate signal

Note

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

    ## Heart Rate Signal Creation
    md=CreateData(verbose=TRUE)
    md=LoadBeatAscii(md,"register_name",verbose=TRUE)
    md=LoadEpisodesAscii(md,"episodes_file_name",verbose=TRUE)
    ## Heart Rate Signal Creation
    md=CreateData(verbose=TRUE)
    md=LoadBeatAscii(md,"beat_ascii.txt",verbose=TRUE)
    md=LoadEpisodesAscii(md,"apnea_ascii_tmp.txt",verbose=TRUE)
    md=BuildNIHR(md,verbose=TRUE)
    md=FilterNIHR(md,verbose=TRUE)
    md=InterpolateNIHR(md,verbose=TRUE)
    ## Calculating Spectrogram
    CalculateSpectrogram(md,size=120,shift=10,sizesp=1024,verbose=TRUE)

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)


[Package RHRV version 1.6.2 Index]