Class: Chainer::Functions::Math::Identity

Inherits:
Chainer::FunctionNode show all
Defined in:
lib/chainer/functions/math/identity.rb

Overview

Identity function.

Instance Attribute Summary

Attributes inherited from Chainer::FunctionNode

#inputs, #outputs, #rank

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Chainer::FunctionNode

#apply, #backward_accumulate, #forward_cpu, #get_retained_inputs, #get_retained_outputs, #initialize, #label, #output_data, #retain_inputs, #retain_outputs, #unchain

Constructor Details

This class inherits a constructor from Chainer::FunctionNode

Class Method Details

.identity(*inputs) ⇒ Object

Just returns input variables.



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# File 'lib/chainer/functions/math/identity.rb', line 20

def self.identity(*inputs)
  ret = self.new.apply(inputs)
  ret.size == 1 ? ret[0] : ret
end

Instance Method Details

#backward(indexes, gys) ⇒ Object 



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# File 'lib/chainer/functions/math/identity.rb', line 15

def backward(indexes, gys)
  return gys
end

#check_type_forward(in_types) ⇒ Object 



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# File 'lib/chainer/functions/math/identity.rb', line 6

def check_type_forward(in_types)
  # pass
end

#forward(xs) ⇒ Object 



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# File 'lib/chainer/functions/math/identity.rb', line 10

def forward(xs)
  retain_inputs([])
  return xs
end