The function extracts features from functional data based on the fast fourier transform. For more details refer to stats::fft.
extractFDAFourier(trafo.coeff = "phase")(data.frame).
(character(1))
Specifies which transformation of the complex frequency domain
representation should be calculated as a feature representation.
Must be one of “amplitude” or “phase”.
Default is “phase”.
The phase shift is returned in Rad, i.e. values lie in [-180, 180].
Other fda_featextractor:
extractFDABsignal(),
extractFDADTWKernel(),
extractFDAFPCA(),
extractFDAMultiResFeatures(),
extractFDATsfeatures(),
extractFDAWavelets()