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%% Evaluate the Classification Error of a Classification Tree Classifier % Evaluate the _k_-fold cross-validation error for a classification tree % model. %% % Load Fisher's iris data set. % Copyright 2015 The MathWorks, Inc. load fisheriris %% % Train a classification tree using default options. Mdl = fitctree(meas,species); %% % Cross validate the classification tree model. CVMdl = crossval(Mdl); %% % Estimate the 10-fold cross-validation loss. L = kfoldLoss(CVMdl)