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imag function for type Polynomial

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
48/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
julia
Domain
backend

Research direction

Run the Julia MWE in the issue to reproduce the missing imag(::Polynomial) method, then inspect how the existing real and conj methods are defined in Polynomials.jl. Done means imag(p) works for the demonstrated complex polynomial with behavior analogous to those methods.

Written by the indexing model from the issue text.

Description

Hi, is there a reason real and conj are defined for the type Polynomial but imag is not? If no reason not to, I can make a PR defining the analogous functions. As a MWE, the real, and conj calls work, but imag is not defined.

using Polynomials
p = Polynomial((6,3,3.0+1im))
real(p)
conj(p)
imag(p)

ERROR: MethodError: no method matching imag(::Polynomial{ComplexF64, :x})

Closest candidates are:
  imag(::Missing)
   @ Base missing.jl:101
  imag(::LinearAlgebra.UnitLowerTriangular)
   @ LinearAlgebra ~/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/LinearAlgebra/src/triangular.jl:160
  imag(::LinearAlgebra.UnitUpperTriangular)
   @ LinearAlgebra ~/.julia/juliaup/julia-1.10.5+0.x64.linux.gnu/share/julia/stdlib/v1.10/LinearAlgebra/src/triangular.jl:161
  ...

Stacktrace:
 [1] top-level scope
   @ REPL[5]:1

Thanks!

Dominant language
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Merged PRs (30d)
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