code: public static Vector3 createVector(double x, double y, double z) {
  		Vector3 v=new Vector3Impl();
  		v.setX(x);
  		v.setY(y);
  		v.setZ(z);
  		return v;
  	}
docs: Creates and initializes a new 3D column vector.
  @param x the x coordinate of the new vector
  @param y the y coordinate of the new vector
  @param z the z coordinate of the new vector
  @return the new vector