treetest has been removed.

Create a tree object, T, using fitctree for a ClassificationTree object or fitrtree for a RegressionTree object, and replace treetest with the appropriate method.

• Replace treetest(T,'resubstitution') with resubLoss(T).

• Replace treetest(T,'test',X,Y) with loss(T,X,Y).

• Replace treetest(T,'crossvalidate',X,Y) with cvloss(T).

For more information, see the resubLoss, loss, or cvloss method reference pages of the ClassificationTree or RegressionTree class in the Statistics and Machine Learning Toolbox documentation.