dft
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Contents
dft
Discrete Fourier Transform.
Usage:
dft(xr, 0)
dft(xr)
Function:
Forward DFT of the real signal xr. nrow(xr) must be even.
Result:
A complex spectrum with nrow(xr)/2 complex elements (1st half).
Usage:
dft(xc, 1)
Function:
Forward DFT of the complex signal xc.
Result:
A complex spectrum of the same type as xc.
Usage:
dft(xc, 2)
Function:
Inverse DFT of the symmetrical complex spectrum.
Result:
A real signal with nrow(xc)*2 elements.
Usage:
dft(xc, 3)
Function:
Inverse DFT of the complex spectrum xc.
Result:
A complex spectrum of the same type as xc.
