A method and system for representing data includes providing a data representation according to defined variables and a functional relationship between the defined variables and receiving an assigned weight assigned to a defined variable. The method includes receiving a modification of a selected defined variable, and providing a further data representation according to a recalculation of an unselected defined variable, based upon the functional relationship, the assigned weight and the modified variable. Assigned weights and a plurality of modifications of the weighted variable are received. A further data representation is provided according to a further recalculation of the weighted variable based upon a weight selected from the assigned weights according to a previous modification of the weighted variable. The recalculating is performed according to a number of modifications performed since the previous modification of the weighted variable and according to a period of time since the previous modification of the weighted variable.