SIS                     (Iterative) Sure Independence Screening
                        ((I)SIS) and Fitting in Generalized Linear
                        Models and Cox's Proportional Hazards Models
leukemia.test           Gene expression Leukemia testing data set from
                        Golub et al. (1999)
leukemia.train          Gene expression Leukemia training data set from
                        Golub et al. (1999)
predict.SIS             Model prediction based on a fitted SIS object.
prostate.test           Gene expression Prostate Cancer testing data
                        set from Singh et al. (2002)
prostate.train          Gene expression Prostate Cancer training data
                        set from Singh et al. (2002)
standardize             Standardization of High-Dimensional Design
                        Matrices
tune.fit                Using the 'glmnet' and 'ncvreg' packages, fits
                        a Generalized Linear Model or Cox Proportional
                        Hazards Model using various methods for
                        choosing the regularization parameter lambda
