Flux.jl/src/activation.jl

export σ

σ(x) = 1 ./ (1 .+ exp.(-x))

back!(::typeof(σ), Δ, x) = Δ .* σ(x)./(1.-σ(x))
-												update mxnet backend

											
										
										
											2016-08-23 13:28:54 +00:00
+								export σ
 								σ(x) = 1 ./ (1 .+ exp.(-x))
-												backprop for sigma

											
										
										
											2016-08-24 14:41:30 +00:00
 								back!(::typeof(σ), Δ, x) = Δ .* σ(x)./(1.-σ(x))