extraTrees              Function for training ExtraTree classifier or
                        regression.
predict.extraTrees      Function for making predictions from trained
                        ExtraTree object.
prepareForSave          Prepares ExtraTrees object for save() function
selectTrees             Makes a sub-ExtraTrees object by keeping only
                        selected trees.
setJavaMemory           Utility function for setting Java memory.
toJavaCSMatrix          Utility function for converting an R
                        SparseMatrix (package Matrix) to Java (column)
                        sparse matrix.
toJavaMatrix            Utility function for converting an R matrix
                        (numeric matrix) to Java matrix.
toJavaMatrix2D          Utility function for converting an R matrix
                        (standard matrix or SparseMatrix) to
                        appropriate Java matrix object.
toRMatrix               Utility function for converting Java matrix to
                        R matrix (matrix of doubles).
