Abstract: Data is reduced to a graphic representation by have a core value which is wrapped by an annulus of a related value, the thickness of the annulus and the base diameter of the core representative of the magnitudes of the data being represented. A third data family can be represented by depiction being selected from a group consisting of a segment of said first core circle, a segment of said first annulus, and a second independent annulus concentric with said first annulus depending on whether said third variable is a) more closely related to said first variable, b) more closely related to said second variable, or c) is an independent, stand alone variable, respectively. A sequence of graphic depictions representing pie charts at successive time periods can be interconnected and smoothed to form a 3-D surface of revolution.

Abstract: Data is reduced to a graphic representation by have a core value which is wrapped by an annulus of a related value, the thickness of the annulus and the base diameter of the core representative of the magnitudes of the data being represented. A third data family can be represented by depiction being selected from a group consisting of a segment of said first core circle, a segment of said first annulus, and a second independent annulus concentric with said first annulus depending on whether said third variable is a) more closely related to said first variable, b) more closely related to said second variable, or c) is an independent, stand alone variable, respectively. A sequence of graphic depictions representing pie charts at successive time periods can be interconnected and smoothed to form a 3-D surface of revolution.