CrossValidation         Generate training and testing samples for cross
                        validation
Imputation              Imputation of a numerical vector
Node_cost               Information Gain
build_forest_predict    Prediction using Random Forest or Multivariate
                        Random Forest
build_single_tree       Model of a single tree of Random Forest or
                        Multivariate Random Forest
predicting              Prediction of testing sample in a node
single_tree_prediction
                        Prediction of Testing Samples for single tree
split_node              Splitting Criteria of all the nodes of the tree
splitt2                 Split of the Parent node
variable_importance_measure
                        Calculates variable Importance of a Regression
                        Tree Model
