code: public double[][] getDistanceMatrix() {
  		double[][] matrix = new double[distances.getSize()][distances.getSize()];
  		for (int i = 0; i < matrix.length; i++) {
  			for (int j = i+1; j < matrix.length; j++) {
  				matrix[i][j] = matrix[j][i] = distances.getValue(i, j);
  			}
  		}
  		return matrix;
  	}
docs: Returns the distance matrix used to construct this guide tree.  The scores have been normalized.
  
  @return the distance matrix used to construct this guide tree