Class: DNN::Activations::Sigmoid

Inherits:
Layers::Layer show all
Defined in:
lib/dnn/core/activations.rb

Instance Method Summary collapse

Methods inherited from Layers::Layer

#build, #built?, #initialize, #prev_layer, #shape, #to_hash

Constructor Details

This class inherits a constructor from DNN::Layers::Layer

Instance Method Details

#backward(dout) ⇒ Object 



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# File 'lib/dnn/core/activations.rb', line 9

def backward(dout)
  dout * (1 - @out) * @out
end

#forward(x) ⇒ Object 



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# File 'lib/dnn/core/activations.rb', line 5

def forward(x)
  @out = 1 / (1 + Xumo::NMath.exp(-x))
end