neuralpp::Synapsis Class Reference

Class for managing synapsis. More...

#include <neural++.hpp>

List of all members.

Public Member Functions
	Synapsis (Neuron *i, Neuron *o, double w, double d)
	Constructor.
	Synapsis (Neuron *i, Neuron *o, double(*a)(double))
	Constructor.
	Synapsis (Neuron *i, Neuron *o, double w, double(*a)(double))
	Constructor.
Neuron *	getIn () const
Neuron *	getOut () const
void	setWeight (double w) throw (InvalidSynapticalWeightException)
	Set the weight of the synapsis.
void	setDelta (double d) throw (InvalidSynapticalWeightException)
	It sets the delta (how much to change the weight after an update) of the synapsis.
double	getWeight () const
	Return the weight of the synapsis.
double	getDelta () const
	Return the delta of the synapsis.
double	getPrevDelta () const
	Get the delta of the synapsis at the previous iteration.
double	momentum (int N, int x) const
	Get the inertial momentum of a synapsis.
Private Attributes
double	delta
double	prev_delta
double	weight
Neuron *	in
Neuron *	out
double(*	actv_f )(double)

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Detailed Description

Class for managing synapsis.

Don't use this class directly unless you know what you're doing, use NeuralNet instead

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Constructor & Destructor Documentation

neuralpp::Synapsis::Synapsis	(	Neuron *	i,
		Neuron *	o,
		double	w,
		double	d
	)

Constructor.

Parameters:

	i	Input neuron
	o	Output neuron
	w	Weight for the synapsis
	d	Delta for the synapsis

neuralpp::Synapsis::Synapsis	(	Neuron *	i,
		Neuron *	o,
		double(*)(double)	a
	)

Constructor.

Parameters:

	i	Input neuron
	o	Output neuron
	a	Activation function

neuralpp::Synapsis::Synapsis	(	Neuron *	i,
		Neuron *	o,
		double	w,
		double(*)(double)	a
	)

Constructor.

Parameters:

	i	Input neuron
	o	Output neuron
	w	Weight for the synapsis (default: random)
	a	Activation function

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Member Function Documentation

Neuron* neuralpp::Synapsis::getIn

(

)

const

Returns:

Reference to input neuron of the synapsis

Neuron* neuralpp::Synapsis::getOut

(

)

const

Returns:

Reference to output neuron of the synapsis

void neuralpp::Synapsis::setWeight

(

double

w

)

throw (InvalidSynapticalWeightException)

Set the weight of the synapsis.

Parameters:

w

Weight to be set

void neuralpp::Synapsis::setDelta

(

double

d

)

throw (InvalidSynapticalWeightException)

It sets the delta (how much to change the weight after an update) of the synapsis.

Parameters:

d

Delta to be set

double neuralpp::Synapsis::getWeight

(

)

const

Return the weight of the synapsis.

Returns:

Weight of the synapsis

double neuralpp::Synapsis::getDelta

(

)

const

Return the delta of the synapsis.

Returns:

Delta of the synapsis

double neuralpp::Synapsis::getPrevDelta

(

)

const

Get the delta of the synapsis at the previous iteration.

Returns:

The previous delta

double neuralpp::Synapsis::momentum	(	int	N,
		int	x
	)			const

Get the inertial momentum of a synapsis.

This value is inversely proportional to the number of steps done in the learning phase (quite high at the beginning, decreasing to zero towards the end of the learning algorithm), and is needed to avoid strong oscillations in output values at the beginning, caused by the random values assigned to the synaptical weights

Parameters:

	N	The number of iterations the network must have to adjust the output values
	x	The number of iterations already taken

Returns:

The inertial momentum of the synapsis

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Member Data Documentation

double neuralpp::Synapsis::delta [private]

double neuralpp::Synapsis::prev_delta [private]

double neuralpp::Synapsis::weight [private]

Neuron* neuralpp::Synapsis::in [private]

Neuron* neuralpp::Synapsis::out [private]

double(* neuralpp::Synapsis::actv_f)(double) [private]

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The documentation for this class was generated from the following file:

• neural++.hpp