# FFT documentation

**URL:** <https://discourse.julialang.org/t/fft-documentation/94431>\
**Category:** General Usage\
**Created:** [February 10, 2023, 8:04pm UTC](https://discourse.julialang.org/t/fft-documentation/94431 "2023-02-10T20:04:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Cevheriferd](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cevheriferd/32/26792_2.png) [@Cevheriferd](https://discourse.julialang.org/u/Cevheriferd)\
**Post date:** [February 10, 2023, 8:04pm UTC](https://discourse.julialang.org/t/fft-documentation/94431/1 "2023-02-10T20:04:59Z")

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Hi I have a very general question. As far as I understand AbstractFFTs is the main package in Julia to perform FFTs. Why doesn’t the documentation of this package show up when searching it several search engines? The search results show FFTW.jl after searching something like “FFT julia documentation” or “FFT Julia”.

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**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [February 10, 2023, 8:08pm UTC](https://discourse.julialang.org/t/fft-documentation/94431/2 "2023-02-10T20:08:34Z")

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> [@Cevheriferd](#):
>
> As far as I understand AbstractFFTs is the main package in Julia to perform FFTs.

no, if you read the README, it says

> This package is mainly not intended to be used directly. Instead, developers of packages that implement FFTs (such as [FFTW.jl](https://github.com/JuliaMath/FFTW.jl) or [FastTransforms.jl](https://github.com/JuliaApproximation/FastTransforms.jl)) extend the types/functions defined in `AbstractFFTs`.

In other words, if you’re a user you’re probably looking for FFTW or FastTransforms

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<div class="post-metadata">

**Author:** ![Cevheriferd](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cevheriferd/32/26792_2.png) [@Cevheriferd](https://discourse.julialang.org/u/Cevheriferd)\
**Post date:** [February 10, 2023, 8:21pm UTC](https://discourse.julialang.org/t/fft-documentation/94431/3 "2023-02-10T20:21:15Z")

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Yes I read that too from the FFTW.jl documentation. But then I would expect that the FFT functions would also be documented there. Now it is quite cumbersome to find the documentation on a function like fft(). (I expected something more of the likes of scipy/numpy).

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**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [February 10, 2023, 8:24pm UTC](https://discourse.julialang.org/t/fft-documentation/94431/4 "2023-02-10T20:24:44Z")

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I guess `FFTW.jl` needs its own doc strings

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**Author:** ![Cevheriferd](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/cevheriferd/32/26792_2.png) [@Cevheriferd](https://discourse.julialang.org/u/Cevheriferd)\
**Post date:** [February 11, 2023, 3:00pm UTC](https://discourse.julialang.org/t/fft-documentation/94431/5 "2023-02-11T15:00:24Z")

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I will open an issue at the GIT repository