Spot operator: opDFT | Spot Home Page |
opDFT Fast Fourier transform (DFT). opDFT(M) create a unitary one-dimensional discrete Fourier transform (DFT) for vectors of length M. opDFT(M,CENTERED), with the CENTERED flag set to true, creates a unitary DFT that shifts the zero-frequency component to the center of the spectrum.