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add spzeros(::Tuple{<:Integer}) #40515

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Merged
dkarrasch merged 5 commits into from
Apr 18, 2021
Merged

add spzeros(::Tuple{<:Integer}) #40515

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a36aedf
add spzeros(::Tuple{<Integer})
abraunst Apr 17, 2021
e19e8d8
implement spzeros(Tv, (n,)) and spzeros(Ti, Tv, (n,))
abraunst Apr 17, 2021
251be42
add tests for spzeros
abraunst Apr 17, 2021
11658fe
fix test
abraunst Apr 18, 2021
2701d85
Test `Int16` instead of `Int`
abraunst Apr 18, 2021
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3 changes: 3 additions & 0 deletions stdlib/SparseArrays/src/sparsevector.jl
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Expand Up @@ -125,8 +125,11 @@ Base.unaliascopy(S::SparseVector) = typeof(S)(length(S), unaliascopy(nonzeroinds
### Construct empty sparse vector

spzeros(len::Integer) = spzeros(Float64, len)
spzeros(dims::Tuple{<:Integer}) = spzeros(Float64, dims[1])
spzeros(::Type{T}, len::Integer) where {T} = SparseVector(len, Int[], T[])
spzeros(::Type{T}, dims::Tuple{<:Integer}) where {T} = spzeros(T, dims[1])
spzeros(::Type{Tv}, ::Type{Ti}, len::Integer) where {Tv,Ti<:Integer} = SparseVector(len, Ti[], Tv[])
spzeros(::Type{Tv}, ::Type{Ti}, dims::Tuple{<:Integer}) where {Tv,Ti<:Integer} = spzeros(Tv, Ti, dims[1])

LinearAlgebra.fillstored!(x::SparseVector, y) = (fill!(nonzeros(x), y); x)

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6 changes: 5 additions & 1 deletion stdlib/SparseArrays/test/sparsevector.jl
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Expand Up @@ -75,7 +75,11 @@ end
@testset "other constructors" begin
# construct empty sparse vector

@test exact_equal(spzeros(Float64, 8), SparseVector(8, Int[], Float64[]))
for dims in (8, (8,))
@test exact_equal(spzeros(dims), SparseVector(8, Int[], Float64[]))
@test exact_equal(spzeros(Float64, dims), SparseVector(8, Int[], Float64[]))
@test exact_equal(spzeros(Float64, Int16, dims), SparseVector(8, Int16[], Float64[]))
end

@testset "from list of indices and values" begin
@test exact_equal(
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