Multivariate Decision Tree learner

Question

A lot univariate decision tree learner implementations (C4.5 etc) do exist, but does actually someone know multivariate decision tree learner a

Answer 1

Yes, there are some, such as OC1, but they are less common than ones which make univariate splits. Adding multivariate splits expands the search space enormously. As a sort of compromise, I have seen some logical learners which simply calculate linear discriminant functions and add them to the candidate variable list.