Algoritma Hebbian

Algoritma Hebbian

Algoritmanya :
1. Inisialisasi semua bobot:
wij = 0; dengan i = 1,2,3,...,n; dan j = 1,2,3,...,m;
2. Untuk setiap pasangan input s dan target t, lakukan langkah-langkah sebagai
berikut:
a. Set input dengan nilai sama dengan vektor input:
xi = si; (i=1,2,3,...,n)
b. Set output dengan nilai sama dengan vektor output:
yj = tj; (j=1,2,3,...,m)
c. Perbaiki bobot:
wij(baru) = wij(lama) + xi * yj;
(i=1,2,3,...n; dan j=1,2,3,...,m)
d. Perbaiki bias menurut persamaan b(baru) = b (lama) + y



Program Hebbian
Nama File : Hebb.java

public class Hebb {
    private int[][] inputData;
    private int[] weights;
    private int[] targets;
    private int bias;
    private int output;

    public Hebb(){
        defineWeights();
        defineBias();
        defineInputData();
        defineTargets();
        printData();
        printBobotAwal();
        modificationWeight();
    }

    private void printBobotAwal(){
        System.out.println("Bobot awal dan bias : "+weights[0]+" "+weights[1]+" "+bias);
    }

    public void recognize(int x1, int x2){
        int net = 0;
        net = x1 * weights[0] + x2 * weights[1] + bias;
        System.out.println("input "+x1+" dan "+x2+" hasilnya "+ fungsiAktifasi(net));
    }

    private int fungsiAktifasi(int net){
        if(net>=0)return 1;
        else return -1;
    }

    private void printData(){
        System.out.print("Data inputan : \n");
        System.out.print(" x1  x2  t \n");
        for(int i=0;i<4;i++){
            for(int j=0;j<2;j++){
                System.out.print(" "+inputData[i][j]);
            }
            System.out.print(" "+targets[i]+"\n");
        }
        System.out.println();
    }

    private void modificationWeight(){
        System.out.println("Hitung bobot : x1  x2  bias ");
        for(int i=0;i<4;i++){
            System.out.print("Bobot baru : ");
            for(int j=0;j<2;j++){
                weights[j] = weights[j] + targets[i] * inputData[i][j];
                System.out.print(" "+weights[j]);
            }
            bias = bias + targets[i];
            System.out.print(" "+bias+"\n");
        }

    }

    private void defineWeights(){
        weights = new int[2];
        for(int i=0;i
            weights[i] = 0;
        }
    }

    private void defineBias(){
        bias = 0;
    }

    private void defineTargets(){
        targets = new int[4];
       
        targets[0] = -1;
        targets[1] = -1;
        targets[2] = -1;
        targets[3] = 1;
    }

    private void defineInputData(){
        inputData = new int[4][2];

        inputData[0][0] = -1;
        inputData[0][1] = -1;
        inputData[1][0] = -1;
        inputData[1][1] = 1;
        inputData[2][0] = 1;
        inputData[2][1] = -1;
        inputData[3][0] = 1;
        inputData[3][1] = 1;
    }
}

Nama File : Main.java

public class Main {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Hebb h = new Hebb();
        h.recognize(-1, -1);
      h.recognize(-1, 1);
      h.recognize(1, -1);
      h.recognize(1, 1);
    }

}

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