www.gusucode.com > stats 源码程序 matlab案例代码 > stats/EstimatePredictorImportanceRegExample.m
%% Estimate Predictor Importance % Estimate the predictor importance for all predictor variables in the % data. %% % Load the |carsmall| data set. load carsmall %% % Grow a regression tree for |MPG| using |Acceleration|, |Cylinders|, % |Displacement|, |Horsepower|, |Model_Year|, and |Weight| as predictors. X = [Acceleration Cylinders Displacement Horsepower Model_Year Weight]; tree = fitrtree(X,MPG); %% % Estimate the predictor importance for all predictor variables. imp = predictorImportance(tree) %% % |Weight|, the last predictor, has the most impact on mileage. The second % predictor has importance 0, which means that the number of cylinders has % no impact on predictions made with |tree|.