TastyPancakes/Flux.jl
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logloss

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Mike J Innes 2017-04-28 17:14:27 +01:00
parent ef4ec5be4b
commit 360d128b1a
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src/cost.jl
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@ -3,3 +3,7 @@ export mse, mse!
mse(ŷ, y) = sumabs2(ŷ .- y)/2 mse(ŷ, y) = sumabs2(ŷ .- y)/2
back!(::typeof(mse), Δ, ŷ, y) = Δ*(ŷ .- y) back!(::typeof(mse), Δ, ŷ, y) = Δ*(ŷ .- y)
logloss(ŷ, y) = -sum(y .* log.(ŷ))
back!(::typeof(logloss), Δ, ŷ, y) = 0 .- Δ .* y ./ ŷ