dataLS                  generate random data for classification as in
                        Long and Servedio (2010)
irb.train               fit a robust predictive model with iteratively
                        reweighted boosting algorithm
irb.train_aft           fit a robust accelerated failure time model
                        with iteratively reweighted boosting algorithm
irboost                 fit a robust predictive model with iteratively
                        reweighted boosting algorithm
