JuliaArrays / JuliaArrays/FillArrays.jl
SparseMatrixCSC + Zeros returns dense matrix
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- Dominant language
- Julia
- Stars
- 187
- Forks
- 41
- Avg merge
- 17h 29m
- Merged PRs (30d)
- 1
Description
julia> x = sparse([1, 2], [1, 2], [1.0, 2.0])
2×2 SparseMatrixCSC{Float64, Int64} with 2 stored entries:
1.0 ⋅
⋅ 2.0
julia> y = FillArrays.Zeros{Float64}(2, 2)
2×2 Zeros{Float64}
julia> x + y
2×2 Matrix{Float64}:
1.0 0.0
0.0 2.0
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by running the Julia reproducer from the issue and inspect how SparseMatrixCSC plus FillArrays.Zeros is dispatched. Identify the expected sparse result and add a regression test covering this operation; done means the addition no longer produces an unexpectedly dense matrix.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- data
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100