# Packages for rational interpolation?

**URL:** <https://discourse.julialang.org/t/packages-for-rational-interpolation/62831>\
**Category:** New to Julia\
**Tags:** question, package, interpolations\
**Created:** [June 13, 2021, 11:04am UTC](https://discourse.julialang.org/t/packages-for-rational-interpolation/62831 "2021-06-13T11:04:19Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![BambOoxX](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bambooxx/32/22179_2.png) [@BambOoxX](https://discourse.julialang.org/u/BambOoxX)\
**Post date:** [June 13, 2021, 11:04am UTC](https://discourse.julialang.org/t/packages-for-rational-interpolation/62831/1 "2021-06-13T11:04:19Z")

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Given the numerous packages and other developments about polynomials and interpolations in the Julia ecosystem (e.g. [Polynomials.jl](https://github.com/JuliaMath/Polynomials.jl), [SpecialPolynomials.jl](https://juliahub.com/docs/SpecialPolynomials/LrhA0/0.1.0/) and [Interpolations.jl](https://github.com/JuliaMath/Interpolations.jl)) , I was wondering if there are some packages that deal with rational interpolation.

By now I only found [BaryRational.jl](https://github.com/macd/BaryRational.jl), but as often that may be just because of a lack of proper keywords in my search.

Side-note, a multi-variate capable package would be a plus.

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<div class="post-metadata">

**Author:** ![j\_verzani](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/j_verzani/32/8551_2.png) [@j\_verzani](https://discourse.julialang.org/u/j_verzani)\
**Post date:** [June 13, 2021, 11:16am UTC](https://discourse.julialang.org/t/packages-for-rational-interpolation/62831/2 "2021-06-13T11:16:57Z")

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There is a note here [https://github.com/JuliaMath/Polynomials.jl/blob/master/src/rational-functions/fit.jl#L14](https://github.com/JuliaMath/Polynomials.jl/blob/master/src/rational-functions/fit.jl#L14) with a bit of a summary. It also includes reference to a `RationalApproximations` package.