JuliaMath / JuliaMath/FastChebInterp.jl

Support for custom types?

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enhancement
Dominant language
Julia
Stars
83
Forks
7
PR merge metrics
No merged PRs in 30d

Description

Can this package handle custom types in a Hilbert space?

import Base: +, *

struct Foo
  x::Float64
  y::Float64
end

+(f1::Foo, f2::Foo) = Foo(f1.x + f2.x, f1.y + f2.y)
*(a::Real, f::Foo) = Foo(a * f.x, a * f.y)

g(x) = Foo(x[1], x[2])
lb, ub = [1,3], [2, 4]
x = chebpoints((10,20), lb, ub)
c = chebinterp(g.(x), lb, ub)
ERROR: MethodError: no method matching zero(::Type{Any})

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the Julia example using the custom Foo type, focusing on the chebpoints and chebinterp entry points named in the issue. Trace the path that produces zero(::Type{Any}); done means the example supports custom types in this Hilbert-space use case without that MethodError.

Written by the indexing model from the issue text.

Assessment

Tech stack
julia
Domain
data
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
28/100

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