Methodology and MGM(1,n) model of line chart data processing in computer aided design

The multiple variable grey MGM(1,n) model was built by applying the theory of grey system.This model is an extension of GM(1,1) model under the condition of n elemental variables,yet it was neither the simple combination of GM(1,1) model nor equals to only establishing the single first ordered differential equation with n elements in the GM(1,n) model,it was to establish n differential equations with n elements.By way of simultaneous solution,let the parameters in the MGM model be able to reflect the relationships of mutual affection and mutual restriction among multiple variables.This model possesses characteristics of high accuracy and of simple and convenient employment.Living examples using the MGM(1,2) and the MGM(1,3) line chart processing made clear that this method is simple in practice and is worthy to be popularized in application for the computer aided design.