# Trying to understand what FFT returns to me

**URL:** <https://discourse.julialang.org/t/trying-to-understand-what-fft-returns-to-me/76331>\
**Category:** Numerics\
**Tags:** question, fftw\
**Created:** [February 13, 2022, 7:37am UTC](https://discourse.julialang.org/t/trying-to-understand-what-fft-returns-to-me/76331 "2022-02-13T07:37:00Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![rafael.guerra](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rafael.guerra/32/216610_2.png) [@rafael.guerra](https://discourse.julialang.org/u/rafael.guerra)\
**Post date:** [February 13, 2022, 10:00am UTC](https://discourse.julialang.org/t/trying-to-understand-what-fft-returns-to-me/76331/5 "2022-02-13T10:00:28Z")

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@Abhijit_Chowdhary, sorry but I’ve deleted my previous post as the answer was not general. Meanwhile, I am linking [this other post](https://discourse.julialang.org/t/extracting-fourier-coefficients-of-an-arbitrary-periodic-signal/51036/8) where the Fourier coefficients were written more carefully by following their definition.

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