Removes the points of a design with a weight lower than a threshold, delta, and distributes that weights
proportionally to the rest of the points.
delete_points(design, delta)The design without the removed points.
The design from which to remove points as a dataframe with two columns:
Point contains the support points of the design.
Weight contains the corresponding weights of the Points.
The threshold from which the points with such a weight or lower will be removed.