/*

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*/

package dm;

import weka.core.matrix.Matrix;

/**

*

* @author student

*/

public class Irysy {

public static void main(String[] args) throws Exception {

TestDm irysy = new TestDm("C:/Program Files/Weka-3-6/data/iris.arff");

irysy.wypisz();

double[][] Z = new double[150][4];

double[] śr = new double[4];

double[] nowy = new double[4];

for (int i = 0; i < 150; i++) {

for (int q = 0; q < 4; q++) {

Z[i][q] = irysy.element(i, q);

}

}

normalizuj(Z);

Matrix zM = new Matrix(Z);

Matrix cov = zM.transpose().times(zM).times(1. / 150);

System.out.println("Nasza korelacja to: ");

System.out.println(cov);

}

private static void normalizuj(double[][] Z) {

double[] śr = new double[4];

double[] nowy = new double[4];

for (int q = 0; q < 4; q++) {

double suma = 0;

for (int i = 0; i < 150; i++) {

suma = Z[i][q] + suma;

}

śr[q] = suma / 150;

}

for (int i = 0; i < 150; i++) {

for (int q = 0; q < 4; q++) {

Z[i][q] = Z[i][q] - śr[q];

}

}

for (int q = 0; q < 4; q++) {

double suma = 0;

for (int i = 0; i < 150; i++) {

suma = (Z[i][q]) * (Z[i][q]) + suma;

}

nowy[q] = Math.sqrt(suma / 150);

}

for (int i = 0; i < 150; i++) {

for (int q = 0; q < 4; q++) {

Z[i][q] = Z[i][q] / nowy[q];

}

}

}

}