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Epsilon change in normalise for stability #2421

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Nov 5, 2024
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Epsilon change in normalise for stability #2421

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da2061d
epsilon change for stability
billera Apr 7, 2024
b600f7a
Change comment for eps
billera Apr 7, 2024
fbc1186
Merge branch 'master' into master
CarloLucibello Nov 5, 2024
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6 changes: 3 additions & 3 deletions src/layers/stateless.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@

Normalise `x` to mean 0 and standard deviation 1 across the dimension(s) given by `dims`.
Per default, `dims` is the last dimension.
`eps` is a small term added to the denominator for numerical stability.
`eps` is a small term added to the denominator/square root for numerical stability.
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# Examples
```jldoctest
Expand Down Expand Up @@ -37,8 +37,8 @@ true
@inline function normalise(x::AbstractArray; dims=ndims(x), eps=ofeltype(x, 1e-5), ϵ=nothing)
ε = _greek_ascii_depwarn(ϵ => eps, :InstanceNorm, "ϵ" => "eps")
μ = mean(x, dims=dims)
σ = std(x, dims=dims, mean=μ, corrected=false)
return @. (x - μ) / (σ + ε)
σ² = var(x, dims=dims, mean=μ, corrected=false)
return @. (x - μ) / sqrt(σ² + ε^2)
end

"""
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