Class: DNN::Layers::InputLayer

Inherits:
Layer
  • Object
show all
Defined in:
lib/dnn/core/layers.rb

Instance Attribute Summary

Attributes inherited from Layer

#input_shape, #name

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Layer

#built?, #output_shape

Constructor Details

#initialize(input_dim_or_shape) ⇒ InputLayer

Returns a new instance of InputLayer.

Parameters:

  • input_dim_or_shape (Array) —

    Setting the shape or dimension of the input data.



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# File 'lib/dnn/core/layers.rb', line 95

def initialize(input_dim_or_shape)
  super()
  @input_shape = input_dim_or_shape.is_a?(Array) ? input_dim_or_shape : [input_dim_or_shape]
end

Class Method Details

.call(input) ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 85

def self.call(input)
  shape = input.is_a?(Array) ? input[0].shape : input.shape
  self.new(shape[1..-1]).(input)
end

.from_hash(hash) ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 90

def self.from_hash(hash)
  self.new(hash[:input_shape])
end

Instance Method Details

#backward(dy) ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 123

def backward(dy)
  dy
end

#build ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 112

def build
  @built = true
end

#call(input) ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 100

def call(input)
  build unless built?
  if input.is_a?(Array)
    x, prev_link = *input
  else
    x = input
    prev_link = nil
  end
  link = prev_link ? Link.new(prev_link, self) : Link.new(nil, self)
  [forward(x), link]
end

#forward(x) ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 116

def forward(x)
  unless x.shape[1..-1] == @input_shape
    raise DNN_ShapeError.new("The shape of x does not match the input shape. input shape is #{@input_shape}, but x shape is #{x.shape[1..-1]}.")
  end
  x
end

#to_hash ⇒ Object 



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# File 'lib/dnn/core/layers.rb', line 127

def to_hash
  super(input_shape: @input_shape)
end