fast_ft | R Documentation |
Fast Fourier Transform
fast_ft(x, real = T)
If real
: computes F_n X_n with the real-valued Fourier
transformation matrix F_n (see Section 2.1 in Kirch et al (2018)).
If !real
: computes the complex-valued Fourier coefficients
(see (4.5) in Meier (2018)).
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