ChicagoLand             Land Values in Chicago Metropolitan Area
CobarOre                Cobar Ore data 
plot                    Default Ploting Method for rqss()
qss                     Additive Nonparametric Terms for rqss Fitting
rq.fit.sfn              Sparse Regression Quantile Fitting
rq.fit.sfnc             Sparse Constrained Regression Quantile Fitting
rqss                    Additive Quantile Regression Smoothing
