# \#fda

**URL:** https://discourse.julialang.org/tag/fda/902.md

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## [Packages defining functional data types](https://discourse.julialang.org/t/packages-defining-functional-data-types/73539)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 2\
**Last updated:** [February 2, 2022, 8:50pm UTC](https://discourse.julialang.org/t/packages-defining-functional-data-types/73539 "2022-02-02T20:50:41Z")

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Any package out there defining a function type with inner product? In functional data analysis we often define the inner product between two functions as \\langle f, g \\rangle = \\int\_a^b f(t)\\bar{g(t)} dt More formally,…