8 lines
208 B
Julia
8 lines
208 B
Julia
# Cost functions
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mse(ŷ, y) = sum((ŷ .- y).^2)/2
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# back!(::typeof(mse), Δ, ŷ, y) = Δ .* (ŷ .- y)
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logloss(ŷ, y) = -sum(y .* log.(ŷ))
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# back!(::typeof(logloss), Δ, ŷ, y) = 0 .- Δ .* y ./ ŷ
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