class DenseVector extends Vector {

	@Override
	public DenseVector append(double d) {
		double[] data = new double[this.size() + 1];
		System.arraycopy(this.data, 0, data, 0, this.data.length);
		data[this.size()] = d;
		return new DenseVector(data);
	}

	public  DenseVector();
	public  DenseVector(int n);
	public  DenseVector(double[] data);

}