A package providing types that assist with indexing objects in a manner that allows for convenient interpretation of the results of Fourier transforms.
The FFTIndex object serves a purpose analogous to Julia's CartesianIndex, but uses the frequency
bins generated by a Fourier transform instead of the provided array indices. This means there are
two key differences: FFTIndex always provides zero-based indexing for an array, and it
guarantees an inbounds array access due to the periodic boundary conditions assumed by the Fourier
transform. For AbstractArray instances, the exclusive use of FFTIndex for indexing will remove
the bounds check - no @inbounds annotation needed.
The FFTAxis object serves a purpose analogous to Base.OneTo, and represents the frequency bins
generated by a Fourier transform. The FFTAxis objects associated with an indexable object A can
be generated with fftaxes(A).
The FFTIndices object serves a purpose analogous to CartesianIndices, and can be constructed
from a Tuple of integers representing sizes or ranges representing axes, or from the indexable
object directly.
FFTViews.jl, which provides the FFTView array
wrapper.