checkMeasErrorModel     Helper function for gbev-function.
cvLoss                  Cross-validation of boosting iteration.
gbev                    Boosted regression trees with
                        errors-in-variables
gbev.fit                Helper function for gbev-function.
mixModelMatrices        Helper function for gbev-function.
part.dep                Partial dependence
plotLoss                Plot loss function versus iteration.
predict_gbev            Predictions from boosted tree model.
treeMatrix              Matrix with boosted trees.
var.imp                 Variable importance.
