Class: DNN::Activations::Softplus

Inherits:

Layers::Layer

• Object
• Layers::Layer
• DNN::Activations::Softplus

Defined in:

lib/dnn/core/activations.rb

Constant Summary

NMath =

Xumo::NMath

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 48

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

#forward(x) ⇒ Object

# File 'lib/dnn/core/activations.rb', line 43

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