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Fast mean for sparse matrices along dimensions. (#7788)
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@ViralBShah
ViralBShah committed Nov 23, 2014
1 parent 229f4aa commit bde4e65
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2 changes: 2 additions & 0 deletions base/sparse/sparsematrix.jl
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Expand Up @@ -839,6 +839,8 @@ sum{T}(A::SparseMatrixCSC{T}, region) = reducedim(+,A,region,zero(T))
prod{T}(A::SparseMatrixCSC{T}) = nnz(A)!=length(A) ? zero(T) : prod(A.nzval)
prod{T}(A::SparseMatrixCSC{T}, region) = reducedim(*,A,region,one(T))

mean(A::SparseMatrixCSC, region::Integer) = sum(A, region) / size(A, region)

#all(A::SparseMatrixCSC{Bool}, region) = reducedim(all,A,region,true)
#any(A::SparseMatrixCSC{Bool}, region) = reducedim(any,A,region,false)
#sum(A::SparseMatrixCSC{Bool}, region) = reducedim(+,A,region,0,Int)
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2 comments on commit bde4e65

@ViralBShah
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Cc: @JuliaBackports

@tkelman
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@tkelman tkelman commented on bde4e65 Feb 1, 2015

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backported in 541610b

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