org.neuroph.core

Class Layer

java.lang.Object

org.neuroph.core.Layer

Type Parameters:

N - Type of neurons in layer

All Implemented Interfaces:

Serializable, Iterable<Neuron>

Direct Known Subclasses:

CompetitiveLayer, FeatureMapLayer, FeatureMapsLayer, InputLayer

public class Layer
extends Object
implements Iterable<Neuron>, Serializable

 Layer of neurons in a neural network. The Layer is basic neuron container (a collection of neurons),
 and it provides methods for manipulating neurons (add, remove, get, set, calculate, ...).
 

Author:

Zoran Sevarac

See Also:

Neuron, Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected List<Neuron>	neurons Collection of neurons in this layer

Constructor Summary

Constructors

Constructor and Description
Layer() Creates an instance of empty Layer
Layer(int neuronsCount) Creates an instance of empty Layer for specified number of neurons
Layer(int neuronsCount, NeuronProperties neuronProperties) Creates an instance of Layer with the specified number of neurons with specified neuron properties

Method Summary

Modifier and Type	Method and Description
void	addNeuron(int index, Neuron neuron) Adds specified neuron to this layer,at specified index position Throws IllegalArgumentException if neuron is null, or index is illegal value (index<0 or index>neuronsCount)
void	addNeuron(Neuron neuron) Adds specified neuron to this layer
void	calculate() Performs calculaton for all neurons in this layer
String	getLabel() Get layer label
Neuron	getNeuronAt(int index) Returns neuron at specified index position in this layer
List<Neuron>	getNeurons() Returns array neurons in this layer as array
int	getNeuronsCount() Returns number of neurons in this layer
NeuralNetwork	getParentNetwork() Returns reference to parent network
int	indexOf(Neuron neuron) Returns the index position in layer for the specified neuron
void	initializeWeights(double value) Initialize connection weights for the whole layer to to specified value
boolean	isEmpty()
Iterator<Neuron>	iterator()
void	removeAllNeurons()
void	removeNeuron(Neuron neuron) Removes neuron from layer
void	removeNeuronAt(int index) Removes neuron at specified index position in this layer
void	reset() Resets the activation and input levels for all neurons in this layer
void	setLabel(String label) Set layer label
void	setNeuron(int index, Neuron neuron) Sets (replace) the neuron at specified position in layer
void	setParentNetwork(NeuralNetwork parent) Sets reference on parent network

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

neurons

protected List<Neuron> neurons

Collection of neurons in this layer

Constructor Detail

Layer

public Layer()

Creates an instance of empty Layer

Layer

public Layer(int neuronsCount)

Creates an instance of empty Layer for specified number of neurons

Parameters:

neuronsCount - number of neurons in this layer

Layer

public Layer(int neuronsCount,
             NeuronProperties neuronProperties)

Creates an instance of Layer with the specified number of neurons with specified neuron properties

Parameters:

neuronsCount - number of neurons in layer

neuronProperties - properties of neurons in layer

Method Detail

setParentNetwork

public final void setParentNetwork(NeuralNetwork parent)

Sets reference on parent network

Parameters:

parent - parent network

getParentNetwork

public final NeuralNetwork getParentNetwork()

Returns reference to parent network

Returns:

reference on parent neural network

getNeurons

public final List<Neuron> getNeurons()

Returns array neurons in this layer as array

Returns:

array of neurons in this layer

addNeuron

public final void addNeuron(Neuron neuron)

Adds specified neuron to this layer

Parameters:

neuron - neuron to add

addNeuron

public final void addNeuron(int index,
                            Neuron neuron)

Adds specified neuron to this layer,at specified index position Throws IllegalArgumentException if neuron is null, or index is illegal value (index<0 or index>neuronsCount)

Parameters:

neuron - neuron to add

index - index position at which neuron should be added

setNeuron

public final void setNeuron(int index,
                            Neuron neuron)

Sets (replace) the neuron at specified position in layer

Parameters:

index - index position to set/replace

neuron - new Neuron object to set

removeNeuron

public final void removeNeuron(Neuron neuron)

Removes neuron from layer

Parameters:

neuron - neuron to remove

removeNeuronAt

public final void removeNeuronAt(int index)

Removes neuron at specified index position in this layer

Parameters:

index - index position of neuron to remove

removeAllNeurons

public final void removeAllNeurons()

getNeuronAt

public Neuron getNeuronAt(int index)

Returns neuron at specified index position in this layer

Parameters:

index - neuron index position

Returns:

neuron at specified index position

indexOf

public int indexOf(Neuron neuron)

Returns the index position in layer for the specified neuron

Parameters:

neuron - neuron object

Returns:

index position of specified neuron

getNeuronsCount

public int getNeuronsCount()

Returns number of neurons in this layer

Returns:

number of neurons in this layer

calculate

public void calculate()

Performs calculaton for all neurons in this layer

reset

public void reset()

Resets the activation and input levels for all neurons in this layer

initializeWeights

public void initializeWeights(double value)

Initialize connection weights for the whole layer to to specified value

Parameters:

value - the weight value

getLabel

public String getLabel()

Get layer label

Returns:

layer label

setLabel

public void setLabel(String label)

Set layer label

Parameters:

label - layer label to set

isEmpty

public boolean isEmpty()

iterator

public Iterator<Neuron> iterator()

Specified by:

iterator in interface Iterable<Neuron>