Class: CooCoo::FullyConnectedLayer
- Defined in:
- lib/coo-coo/fully_connected_layer.rb
Instance Attribute Summary collapse
-
#activation_function ⇒ Object
readonly
Returns the value of attribute activation_function.
-
#bias ⇒ Object
readonly
Returns the value of attribute bias.
-
#weights ⇒ Object
readonly
Returns the value of attribute weights.
Class Method Summary collapse
Instance Method Summary collapse
- #==(other) ⇒ Object
- #add_inputs!(new_size) ⇒ Object
- #add_neurons!(new_size) ⇒ Object
- #adjust_weights!(deltas) ⇒ Object
- #backprop(input, output, errors, hidden_state) ⇒ Object
- #forward(input, hidden_state) ⇒ Object
-
#initialize(num_inputs, size, activation_func = ActivationFunctions::Identity.instance, weights = nil, bias = nil) ⇒ FullyConnectedLayer
constructor
A new instance of FullyConnectedLayer.
- #neuron_hash ⇒ Object
- #num_inputs ⇒ Object
- #size ⇒ Object
- #to_hash(network = nil) ⇒ Object
- #transfer_error(deltas) ⇒ Object
- #transfer_input_error(expecting) ⇒ Object
- #update_from_hash!(h) ⇒ Object
- #update_neuron_from_hash!(neuron_index, h) ⇒ Object
- #update_weights!(inputs, deltas) ⇒ Object
- #weight_deltas(inputs, deltas) ⇒ Object
Constructor Details
#initialize(num_inputs, size, activation_func = ActivationFunctions::Identity.instance, weights = nil, bias = nil) ⇒ FullyConnectedLayer
Returns a new instance of FullyConnectedLayer.
15 16 17 18 19 20 21 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 15 def initialize(num_inputs, size, activation_func = ActivationFunctions::Identity.instance, weights = nil, bias = nil) @num_inputs = num_inputs @size = size @activation_function = activation_func @weights = weights || @activation_function.initial_weights(num_inputs, size) @bias = bias || @activation_function.initial_bias(size) end |
Instance Attribute Details
#activation_function ⇒ Object (readonly)
Returns the value of attribute activation_function.
13 14 15 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 13 def activation_function @activation_function end |
#bias ⇒ Object (readonly)
Returns the value of attribute bias.
11 12 13 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 11 def bias @bias end |
#weights ⇒ Object (readonly)
Returns the value of attribute weights.
12 13 14 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 12 def weights @weights end |
Class Method Details
.from_hash(h, network = nil) ⇒ Object
139 140 141 142 143 144 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 139 def from_hash(h, network = nil) self.new(h[:neurons][0][:num_inputs], h[:outputs], ActivationFunctions.from_name(h[:f] || 'Identity')). update_from_hash!(h) end |
Instance Method Details
#==(other) ⇒ Object
130 131 132 133 134 135 136 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 130 def ==(other) other.kind_of?(self.class) && size == other.size && bias == other.bias && weights == other.weights && activation_function == other.activation_function end |
#add_inputs!(new_size) ⇒ Object
98 99 100 101 102 103 104 105 106 107 108 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 98 def add_inputs!(new_size) if new_size != num_inputs w = CooCoo::Vector.zeros(new_size * size) w.set2d!(new_size, @weights, num_inputs, 0, 0) w.set2d!(new_size, @activation_function.initial_weights(size, 1), 1, new_size - 1, 0) @weights = w @num_inputs = new_size end self end |
#add_neurons!(new_size) ⇒ Object
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 82 def add_neurons!(new_size) if new_size != @size w = CooCoo::Vector.zeros(num_inputs * new_size) w[0, @weights.size] = @weights w[@weights.size, num_inputs] = @activation_function.initial_weights(num_inputs, 1) @weights = w @bias = CooCoo::Vector.ones(new_size).set(@bias) @bias[-1] = @activation_function.initial_bias(1)[0] @size = new_size end self end |
#adjust_weights!(deltas) ⇒ Object
55 56 57 58 59 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 55 def adjust_weights!(deltas) @bias -= deltas.bias_deltas @weights -= deltas.weight_deltas self end |
#backprop(input, output, errors, hidden_state) ⇒ Object
39 40 41 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 39 def backprop(input, output, errors, hidden_state) return errors, hidden_state end |
#forward(input, hidden_state) ⇒ Object
35 36 37 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 35 def forward(input, hidden_state) return @weights.dot(num_inputs, size, input, 1, num_inputs) + @bias, hidden_state end |
#neuron_hash ⇒ Object
73 74 75 76 77 78 79 80 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 73 def neuron_hash @weights.each_slice(num_inputs).with_index.collect do |neuron_weights, i| { num_inputs: num_inputs, weights: neuron_weights.to_a, bias: @bias[i] } end end |
#num_inputs ⇒ Object
27 28 29 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 27 def num_inputs @num_inputs end |
#size ⇒ Object
31 32 33 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 31 def size @size end |
#to_hash(network = nil) ⇒ Object
65 66 67 68 69 70 71 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 65 def to_hash(network = nil) { type: self.class.to_s, outputs: size, neurons: neuron_hash, f: activation_function.name } end |
#transfer_error(deltas) ⇒ Object
43 44 45 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 43 def transfer_error(deltas) deltas.dot(size, 1, @weights, num_inputs, size) end |
#transfer_input_error(expecting) ⇒ Object
47 48 49 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 47 def transfer_input_error(expecting) (output - expecting).to_a end |
#update_from_hash!(h) ⇒ Object
119 120 121 122 123 124 125 126 127 128 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 119 def update_from_hash!(h) add_neurons!(h[:outputs]) add_inputs!(h[:neurons][0][:num_inputs]) h[:outputs].times do |i| update_neuron_from_hash!(i, h[:neurons][i]) end self end |
#update_neuron_from_hash!(neuron_index, h) ⇒ Object
110 111 112 113 114 115 116 117 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 110 def update_neuron_from_hash!(neuron_index, h) if neuron_index > size add_neurons!(neuron_index) end @weights[neuron_index * num_inputs, num_inputs] = h[:weights] @bias[neuron_index] = h[:bias] end |
#update_weights!(inputs, deltas) ⇒ Object
51 52 53 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 51 def update_weights!(inputs, deltas) adjust_weights!(weight_deltas(inputs, deltas)) end |
#weight_deltas(inputs, deltas) ⇒ Object
61 62 63 |
# File 'lib/coo-coo/fully_connected_layer.rb', line 61 def weight_deltas(inputs, deltas) WeightDeltas.new(deltas, deltas.dot(1, size, inputs, num_inputs, 1)) end |