www.gusucode.com > stats 源码程序 matlab案例代码 > stats/CreateanAddedVariablePlotforParticularVariablesExample.m
%% Create an Added Variable Plot for Particular Variables % Create a model of car mileage as a function of weight and model year. % Then create a plot to see the effect of the weight terms (|Weight| and % |Weight^2|). %% % Create a linear model of mileage from the |carsmall| data. load carsmall tbl = table(MPG,Weight); tbl.Year = ordinal(Model_Year); mdl = fitlm(tbl,'MPG ~ Year + Weight^2'); %% % Find the terms in the model corresponding to the |Weight| and |Weight^2|. mdl.CoefficientNames %% % The weight terms are 2 and 5. %% % Create an added variable plot with the weight terms. coef = [2 5]; plotAdded(mdl,coef) %% % The plot illustrates that the weight terms are significant because a horizontal % line does not fit between the confidence bounds.