|Re: [eigen] A complex FFT for Eigen|
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Benoit Jacob schrieb:
We (as my laserphysics institute group) are using fourier transform for
transforming from frequency to time domain bakc and forth (using complex
numbers, because the phase is very much relevant) and for fourier optics
which is a transformation between the diffracting domain and the fourier
domain where the phase and amplitude of the light wavefront is required
for computation. So from my view it is very common to have complex
numbers, in case you are interested in the phase.
Fourier Transform is by definition using complex numbers.
As far as the math aspect is concerned -- I know ;)
My question was more, is it in practice used that way or is it somehow
hidden like e.g. with Fourier series when one splits off the cos and
sin parts of the fourier series that is basically a complex series