Spillover from research related to @MV10's question in #68, I think FftSharp would benefit from a FftShift helper function. Same goes for a function that generates negative frequencies to facilitate plotting.

Resources

• https://www.gaussianwaves.com/2015/11/interpreting-fft-results-complex-dft-frequency-bins-and-fftshift/
• https://docs.scipy.org/doc/scipy/reference/generated/scipy.fft.fftshift.html