Virtual class that provides basic functionality for nonparametric CUSUM
charts. To use this, create a descendant of the class and implement
xiofP-methods and updates-methods.
Arguments
Objects from the Class
Virtual class - no objects can be created.
Extends
Class "SPCCUSUM", directly.
Class "SPCchart", by class "SPCCUSUM", distance 2.
See Also
SPCCUSUMNonparCenterScale for an example of an
instantiation of this class.