Class: DNN::Activations::Softplus

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

Constant Summary collapse

NMath = 
Xumo::NMath

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 50

def backward(dout)
  dout * (1 / (1 + NMath.exp(-@x)))
end

#forward(x) ⇒ Object 



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# File 'lib/dnn/core/activations.rb', line 45

def forward(x)
  @x = x
  NMath.log(1 + NMath.exp(x))
end