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PerceptronNeuron.h

/* PerceptronNeuron.h
 *
 * Copyright (C) 2002-2003 -- Sebastian Nowozin
 */

#ifndef PERCEPTRONNEURON_H
#define PERCEPTRONNEURON_H

#include <vector>

using namespace std;

class
PerceptronNeuron {
public:
        unsigned int    num;

        double  input;

        double  output;

        vector<double>  weight;

        vector<double>  weight_diff;

        /* functions */

        PerceptronNeuron (unsigned int in_layer_num);

        double getDelta (void) {
                return (delta);
        }

        void setDelta (double newval) {
                delta = newval;
        }

        double getTheta (void) {
                return (theta);
        }

        void setTheta (double newval) {
                theta = newval;
        }

        double getThetaDiff (void) {
                return (theta_diff);
        }

        void initializeWeightings (unsigned int succ_count);

        void resetWeights (void);

        void resetWeightDiffs (void);

        void resetDiffs (void);

        /* ALGORITHMS */

        void postprocessWeight (PerceptronNeuron *succ, double epsilon,
                double weight_decay, double momterm);

        void postprocessTheta (double epsilon, double weight_decay,
                double momterm);

        void update (void);

protected:
        double  delta;

        double  theta;
        double  theta_diff;

        double  theta_diff_last;

        vector<double>  weight_diff_last;
};

#endif

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