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Allow dims::Tuple in sum #909

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Allow dims::Tuple in sum #909

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28202e3
allow dims::Tuple in sum
mcabbott May 8, 2021
7a66328
multiple dimensions for reduce only, not mapreduce
mcabbott May 8, 2021
1a4aa62
fix tests?
mcabbott May 8, 2021
4a986db
one isapprox
mcabbott May 9, 2021
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6 changes: 6 additions & 0 deletions src/mapreduce.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,12 @@ end
end
end

@inline function _mapreduce(f, op, D::Tuple, init, sz::Size{S}, a::StaticArray) where {S}
b = _mapreduce(f, op, first(D), init, sz, a)
return _mapreduce(f, op, Base.tail(D), init, Size(b), b)
end
_mapreduce(f, op, D::Tuple{}, init, sz::Size{S}, a::StaticArray) where {S} = a

@generated function _mapfoldl(f, op, dims::Val{D}, init,
::Size{S}, a::StaticArray) where {S,D}
N = length(S)
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3 changes: 3 additions & 0 deletions test/mapreduce.jl
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Expand Up @@ -102,6 +102,7 @@ using Statistics: mean
RSArray1 = SArray{Tuple{1,J,K}} # reduced in dimension 1
RSArray2 = SArray{Tuple{I,1,K}} # reduced in dimension 2
RSArray3 = SArray{Tuple{I,J,1}} # reduced in dimension 3
RSArray13 = SArray{Tuple{1,J,1}} # reduced in dimension 1 and 3
a = randn(I,J,K); sa = OSArray(a)
b = rand(Bool,I,J,K); sb = OSArray(b)
z = zeros(I,J,K); sz = OSArray(z)
Expand All @@ -111,9 +112,11 @@ using Statistics: mean
@test sum(sa) === sum(a)
@test sum(abs2, sa) === sum(abs2, a)
@test sum(sa, dims=2) === RSArray2(sum(a, dims=2))
@test sum(sa, dims=(2,)) === RSArray2(sum(a, dims=2))
@test sum(sa, dims=Val(2)) === RSArray2(sum(a, dims=2))
@test sum(abs2, sa; dims=2) === RSArray2(sum(abs2, a, dims=2))
@test sum(abs2, sa; dims=Val(2)) === RSArray2(sum(abs2, a, dims=2))
@test_broken sum(abs2, sa; dims=(1,3)) === RSArray13(sum(abs2, a, dims=(1,3)))

@test prod(sa) === prod(a)
@test prod(abs2, sa) === prod(abs2, a)
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