private static double deltaMatrices(double[][] mat1,double[][] mat2){
  double[][] test=Matrix.sub(mat1,mat2);
  double delta=0.0;
  int m=Matrix.getNumOfRows(mat1);
  int n=Matrix.getNumOfColumns(mat1);
  for (int i=0; i < m; ++i) {
    for (int j=0; j < n; ++j) {
      delta+=Math.abs(test[i][j]);
    }
  }
  return (delta / (m * n));
}

private static double deltaMatrices ( double [ ] [ ] mat1 , double [ ] [ ] mat2 ) { double [ ] [ ] test = Matrix . sub ( mat1 , mat2 ) ; double delta = 0.0 ; int m = Matrix . getNumOfRows ( mat1 ) ; int n = Matrix . getNumOfColumns ( mat1 ) ; for ( int i = 0 ; i < m ; ++ i ) { for ( int j = 0 ; j < n ; ++ j ) { delta += Math . abs ( test [ i ] [ j ] ) ; } } return ( delta / ( m * n ) ) ; }
calculates a difference measure of two matrices relative to their size .
