org.deeplearning4j.nn.graph.vertex.impl

Class InputVertex

java.lang.Object

org.deeplearning4j.nn.graph.vertex.BaseGraphVertex

org.deeplearning4j.nn.graph.vertex.impl.InputVertex

All Implemented Interfaces:

Serializable, Trainable, GraphVertex

public class InputVertex
extends BaseGraphVertex

An InputVertex simply defines the location (and connection structure) of inputs to the ComputationGraph. It does not define forward or backward methods.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.deeplearning4j.nn.graph.vertex.BaseGraphVertex

dataType, epsilon, graph, inputs, inputVertices, outputVertex, outputVertices, vertexIndex, vertexName

Constructor Summary

Constructors

Constructor and Description
InputVertex(ComputationGraph graph, String name, int vertexIndex, VertexIndices[] outputVertices, DataType dataType)

Method Summary

Modifier and Type	Method and Description
Pair<Gradient,INDArray[]>	doBackward(boolean tbptt, LayerWorkspaceMgr workspaceMgr) Do backward pass
INDArray	doForward(boolean training, LayerWorkspaceMgr workspaceMgr) Do forward pass using the stored inputs
Pair<INDArray,MaskState>	feedForwardMaskArrays(INDArray[] maskArrays, MaskState currentMaskState, int minibatchSize)
Layer	getLayer() Get the Layer (if any).
boolean	hasLayer() Whether the GraphVertex contains a Layer object or not
boolean	isInputVertex() Whether the GraphVertex is an input vertex
boolean	isOutputVertex() Whether the GraphVertex is an output vertex
void	setBackpropGradientsViewArray(INDArray backpropGradientsViewArray) See Model.setBackpropGradientsViewArray(INDArray)
String	toString()

Methods inherited from class org.deeplearning4j.nn.graph.vertex.BaseGraphVertex

canDoBackward, canDoForward, clear, clearVertex, getConfig, getEpsilon, getGradientsViewArray, getInputVertices, getNumInputArrays, getNumOutputConnections, getOutputVertices, getVertexIndex, getVertexName, numParams, params, paramTable, setEpsilon, setInput, setInputVertices, setLayerAsFrozen, setOutputVertices, updaterDivideByMinibatch

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.deeplearning4j.nn.graph.vertex.GraphVertex

getInputs, setInputs, setOutputVertex

Constructor Detail

InputVertex

public InputVertex(ComputationGraph graph,
                   String name,
                   int vertexIndex,
                   VertexIndices[] outputVertices,
                   DataType dataType)

Method Detail

hasLayer

public boolean hasLayer()

Description copied from interface: GraphVertex

Whether the GraphVertex contains a Layer object or not

isOutputVertex

public boolean isOutputVertex()

Description copied from interface: GraphVertex

Whether the GraphVertex is an output vertex

isInputVertex

public boolean isInputVertex()

Description copied from interface: GraphVertex

Whether the GraphVertex is an input vertex

Specified by:

isInputVertex in interface GraphVertex

Overrides:

isInputVertex in class BaseGraphVertex

getLayer

public Layer getLayer()

Description copied from interface: GraphVertex

Get the Layer (if any). Returns null if GraphVertex.hasLayer() == false

doForward

public INDArray doForward(boolean training,
                          LayerWorkspaceMgr workspaceMgr)

Description copied from interface: GraphVertex

Do forward pass using the stored inputs

Parameters:

training - if true: forward pass at training time. If false: forward pass at test time

Returns:

The output (for example, activations) of the GraphVertex

doBackward

public Pair<Gradient,INDArray[]> doBackward(boolean tbptt,
                                            LayerWorkspaceMgr workspaceMgr)

Description copied from interface: GraphVertex

Do backward pass

Parameters:

tbptt - If true: do backprop using truncated BPTT

Returns:

The gradients (may be null), and the errors/epsilons for all inputs to this GraphVertex

setBackpropGradientsViewArray

public void setBackpropGradientsViewArray(INDArray backpropGradientsViewArray)

Description copied from interface: GraphVertex

See Model.setBackpropGradientsViewArray(INDArray)

feedForwardMaskArrays

public Pair<INDArray,MaskState> feedForwardMaskArrays(INDArray[] maskArrays,
                                                      MaskState currentMaskState,
                                                      int minibatchSize)

toString

public String toString()

Specified by:

toString in class BaseGraphVertex