| fit.control | Auxiliary parameters to control the model fitting | 
| KinkTest | Test the existence of kink effect in the multi-kink quantile regression | 
| mkqr.bea | Fit the multi-kink quantile regression in the absence of the number of change points. | 
| mkqr.fit | Fit the multi-kink quantile regression conditional on a given or pre-specified number of change points. | 
| triceps | Triceps Skinfold Thickness Dataset |