Fast Fourier transform helper

Computes the discrete Fourier transform along the time axis of the default assay and stores the magnitude spectrum in a new assay named "fft".

Usage

fftSignals(x)

Arguments

x

A PhysioExperiment object.

Value

A PhysioExperiment object with an additional "fft" assay containing the magnitude spectrum (same dimensions as the input assay).

References

Oppenheim, A.V. & Willsky, A.S. (1997). "Signals and Systems." 2nd ed. Prentice Hall.

See also

spectrogram() for time-frequency analysis, bandPower() for frequency band power extraction, plotPSD() for power spectral density visualization.