code: protected Point getPointFor(int index) {
  		return new Point(getXFor(diagram.getValue(ValueDimension.X, index)), getYFor(diagram.getValue(ValueDimension.Y, index)));
  	}
docs: Determines the point coordinates for a given value-vector on the base of the maintained dimensions.<br>
  Given two dimensions X and Y with values x1,...,xn and y1,...,yn this method just returns a point
  P(xi,yi) which matches the desired behavior of a standard 2-dimensional diagrams such as graph-plots.<br>
  For changing the way these points are determined it is recommended to override the methods {@link #getXFor(Number)} and {@link #getXFor(Number)} rather than this method,
  since it simply combines the values of these two methods.
  @param index Index for values within the maintained value lists for different dimensions
  @return Point determined on the basis of maintained values
  @see #getXFor(Number)
  @see #getYFor(Number)