I have written the following function to provide the same functionality as numpy's fftfreq (http://docs.scipy.org/doc/numpy/reference/generated/numpy.fft.fftfreq.html)
``` function fftfreq(n::Int64, d::Float64) N = fld(n-1,2) p1 = [0:N] p2 = [-fld(n,2):-1] return [p1, p2]/(d*n) end ``` >From the response on https://github.com/JuliaLang/julia/issues/7317, I understand that such a function is already implemented in the DSP.jl package, perhaps using the immutable Frequencies? I am not quite sure how to use that though, could anyone please provide a concrete example which reproduces the use of fftfreq? Tnx!
