Class: DNN::Activations::SigmoidWithLoss

Inherits:

OutputLayer

Object
DNN::Activations::SigmoidWithLoss

show all

Includes:: SigmoidFunction, Numo

Defined in:: lib/dnn/core/activations.rb

Instance Method Summary collapse

Methods included from SigmoidFunction

Instance Method Details

#backward(y) ⇒ `Object`



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# File 'lib/dnn/core/activations.rb', line 106

def backward(y)
  @out - y
end

#loss(y) ⇒ `Object`



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# File 'lib/dnn/core/activations.rb', line 110

def loss(y)
  -(y * NMath.log(@out + 1e-7) + (1 - y) * NMath.log(1 - @out + 1e-7)).sum / @model.batch_size + ridge
end