lib/dnn/core/activations.rb in ruby-dnn-0.9.3 vs lib/dnn/core/activations.rb in ruby-dnn-0.9.4

@@ -1,10 +1,10 @@
 module DNN
   module Activations
 
     class Sigmoid < Layers::Layer
       def forward(x)
-        @out = Utils.sigmoid(x)
+        @out = 1 / (1 + NMath.exp(-x))
       end
     
       def backward(dout)
         dout * (1 - @out) * @out
       end