www.gusucode.com > stats 源码程序 matlab案例代码 > stats/ViewTreeFromBoostedEnsembleRegExample.m
%% View Tree from Boosted Ensemble %% % Load the |carsmall| data set. Consider a model that explains a car's % fuel economy (|MPG|) using its weight (|Weight|) and number of cylinders % (|Cylinders|). load carsmall X = [Weight Cylinders]; Y = MPG; %% % Boost an ensemble of 100 regression trees using all measurements. Mdl = fitensemble(X,Y,'LSBoost',100,'Tree'); %% % |Mdl| is a <docid:stats_ug.bstzmcl-1 |RegressionEnsemble|> model object. % |Mdl.Trained| stores the ensemble of 100 trained regression trees in a % 100-by-1 cell array. That is, each cell in |Mdl.Trained| contains a % |CompactRegressionTree| model object. %% % View a graph of the 10th regression tree in the ensemble. Tree10 = Mdl.Trained{10}; view(Tree10,'Mode','graph'); %% % By default, |fitensemble| grows shallow trees for boosted ensembles of % trees.