Class: DNN::Activations::Softsign

Inherits:

Layers::Layer

• Object
• Layers::Layer
• DNN::Activations::Softsign

Defined in:

lib/dnn/core/activations.rb

Instance Attribute Summary

Attributes inherited from Layers::Layer

#input_shape

Instance Method Summary

• #backward(dout) ⇒ Object
• #forward(x) ⇒ Object

Methods inherited from Layers::Layer

#build, #built?, #initialize, #output_shape, #to_hash

Constructor Details

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

Instance Method Details

#backward(dout) ⇒ Object

# File 'lib/dnn/core/activations.rb', line 34

def backward(dout)
  dout * (1 / (1 + @x.abs)**2)
end

#forward(x) ⇒ Object

# File 'lib/dnn/core/activations.rb', line 29

def forward(x)
  @x = x
  x / (1 + x.abs)
end