CoxKnotsearch           This function implments GridSearch of natural
                        cubic splines in Cox regression for latency
                        analysis This is GreadSearching by knots
CoxKnotsearch_boot      This function conduct bootstraps for
                        @CoxKnotsearch
CoxNCSpline             This function implments natural cubic splines
                        in Cox regression for latency analysis
CoxPoly                 This is a function to implement polynomial Cox
                        regression for latency analysis
CoxTermsearch           This function implments Stepwise model
                        selection by terms of natural cubic splines in
                        Cox regression for latency analysis This is
                        GreadSearching by knots
CoxTermsearch_boot      This function conduct bootstraps for
                        @CoxTermsearch
extract_CoxKnotsearch   This is a function to extract log HR based on
                        the resuls from CoxKnotsearch
extract_CoxNCSpline     This is a function to extract log HR based on
                        the resuls from CoxNCSpline
extract_CoxPoly         This is a function to extract log HR based on
                        the resuls from CoxPoly
extract_CoxTermsearch   This is a function to extract log HR based on
                        the resuls from CoxTermsearch
resample_clusters       This is a function to help resemple clusters
                        for bootstrap. It is adapted from the function
                        "clusterboot" in the R package "fpc".
sim_data                example A simulated data for the use of example
