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Specialized _var and _std functions #612
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Original file line number | Diff line number | Diff line change |
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import Statistics | ||
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Statistics._var(A::CuArray, corrected::Bool, mean, dims) = | ||
sum((A .- something(mean, Statistics.mean(A, dims=dims))).^2, dims=dims)/(prod(size(A)[[dims...]])-corrected) | ||
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Statistics._var(A::CuArray, corrected::Bool, mean, ::Colon) = | ||
sum((A .- something(mean, Statistics.mean(A))).^2)/(length(A)-corrected) | ||
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Statistics._std(A::CuArray, corrected::Bool, mean, dims) = | ||
sqrt.(Statistics.var(A; corrected=corrected, mean=mean, dims=dims)) | ||
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Statistics._std(A::CuArray, corrected::Bool, mean, ::Colon) = | ||
sqrt.(Statistics.var(A; corrected=corrected, mean=mean, dims=:)) |
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Original file line number | Diff line number | Diff line change |
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@testset "Statistics" begin | ||
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using CuArrays | ||
using Statistics | ||
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@testset "std" begin | ||
A = rand(10, 1, 2) | ||
cuA = cu(A) | ||
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@test std(cuA[:, 1, 1]) ≈ std(A[:, 1, 1]) | ||
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@test std(cuA) ≈ std(A) | ||
@test std(cuA, corrected=true) ≈ std(cuA, corrected=true, dims=:) ≈ std(A, corrected=true) | ||
@test collect(std(cuA, dims=1)) ≈ std(A, dims=1) | ||
end | ||
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end |
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No need for this import.