1. A method for representing data, comprising: providing a data representation in accordance with a functional relationship between a plurality of variables; receiving a modification of a selected variable to provide a modified variable; and providing a further data representation in accordance with a recalculation of a not-selected variable based upon the functional relationship between the selected variable and the not-selected variable, an assigned weight of the modified variable, and the modified variable, wherein the assigned weight of the modified variable is any of an iteration-based cascading weight and a time-based cascading weight.