Survdt                  Create a basic survival object for doubly
                        truncated data.
Survdt2                 Create a survival object for use with
                        time-varying covariates
aids                    AIDS incubation data
coxph_indtrunc          Cox regression under quasi-independent double
                        truncation.
nonprop_sample          Simulated data with non-proportional hazards
                        and independent double truncation
npmle                   Compute the nonparametric MLE under double
                        truncation
plot.npmle              Plot estimates from an NPMLE fit
plot_coxsurv            Plot survival or hazard estimates from a Cox
                        model fit
positivity_sens_indtrunc
                        Sensitivity analysis for positivity violations
                        in a Cox model with quasi-independent double
                        truncation.
test_ignorability_indtrunc
                        Test for non-ignorable sampling bias
test_quasiindep_covariates
                        Test for dependence between truncation times
                        and the event time or covariates
test_quasiindep_ctau    Test for dependence between truncation times
                        and the event time
test_samplediff_indtrunc
                        Test for survival differences across groups
time_split              Split rows in a data frame into multiple
                        observations at specified time intervals
