Perceptron.h

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/*
 *  perceptron.h
 *  games
 *
 *  Created by Nathan Sturtevant on 3/2/05.
 *  Copyright 2005 __MyCompanyName__. All rights reserved.
 *
 */
 
#ifndef PERCEPTRON_H
#define PERCEPTRON_H
#include "FunctionApproximator.h"
 
class perceptron : public FunctionApproximator  {
public:
        perceptron(int inputs, int outputs, double learnrate);
        perceptron(perceptron *);
        perceptron(char *);
        perceptron(FunctionApproximator *);
        ~perceptron();
        
        void save(const char *);
        void save(FILE *);
        void load(const char *);
        void load(FILE *);
        void load(const FunctionApproximator *fa) { load((perceptron*)fa); }
        void load(const perceptron *);
        static bool validSaveFile(char *fname);
 
        double train(std::vector<double> &input, std::vector<double> &output2);
        double *test(const std::vector<double> &input);
        double train(std::vector<unsigned int> &input, std::vector<double> &output2);
        double *test(const std::vector<unsigned int> &input);
        
        void Print();
 
        int getNumInputs() { return inputs+1; }
        double getInputWeight(int inp, int outp=0) { return weight[outp][inp]; }
private:
                void allocateMemory();
        void freeMemory();
 
        double g(double a);
        double dg(double a);
        double outputerr(const std::vector<double> &output, const std::vector<double> &expected, int which);
        
        double error(double* output);
        std::vector<std::vector<double> > weight;
        std::vector<double> output;
        //double** weight;
        //double* output;
        int inputs, outputs;
};
 
#endif