Patent ID: 6927772

Claim:
A method of visually displaying a change in relationships over time between at least two interrelated variables which change over time as a three dimensional geometric figure, the method comprising forming a two dimensional geometric figure by a. depicting a first value of a first interrelated variable which changes over time at a first particular moment in time as a first core circle of a first size; b. depicting a second value of a second interrelated variable which changes over time at said first particular moment in time as a first annulus of a second size surrounding said first core circle, a ratio of said second size of said first annulus to said first size of said first circle being equal to a value selected from i) a ratio of a second area of said first annulus to an area of said core circle, and ii) a ratio of an outer diameter of said first annulus to an outer diameter of said core circle; then, c. producing a sequence of said two dimensional geometric figures representative of said at least two variables at specific successive moments in time; d. stacking said sequence of geometric figures seriatim; e. smoothing an external surface of a resulting three dimensional object of revolution to form a three dimensional representation of said changes in said interrelated variables over time.