ahr                     Average hazard ratio under non-proportional
                        hazards (test version)
as_gt                   Convert summary table of a fixed or group
                        sequential design object to a gt object
expected_accrual        Piecewise constant expected accrual
expected_event          Expected events observed under piecewise
                        exponential model
expected_time           Predict time at which a targeted event count is
                        achieved
fixed_design            Fixed design sample size
gridpts                 Grid points for group sequential design
                        numerical integration
gs_b                    Default boundary generation
gs_create_arm           Create npsurvSS arm object
gs_design_ahr           Group sequential design using average hazard
                        ratio under non-proportional hazards
gs_design_combo         Group sequential design using MaxCombo test
                        under non-proportional hazards
gs_design_npe           Group sequential design computation with
                        non-constant effect and information
gs_design_rd            Group sequential design using average hazard
                        ratio under non-proportional hazards
gs_design_wlr           Group sequential design using weighted log-rank
                        test under non-proportional hazards
gs_info_ahr             Information and effect size based on AHR
                        approximation
gs_info_combo           Information and effect size for MaxCombo test
gs_info_rd              Information and effect size under risk
                        difference
gs_info_wlr             Information and effect size for weighted
                        log-rank test
gs_power_ahr            Group sequential design power using average
                        hazard ratio under non-proportional hazards
gs_power_combo          Group sequential design power using MaxCombo
                        test under non-proportional hazards
gs_power_npe            Group sequential bound computation with
                        non-constant effect
gs_power_rd             Group sequential design power under risk
                        difference
gs_power_wlr            Group sequential design power using weighted
                        log rank test under non-proportional hazards
gs_spending_bound       Derive spending bound for group sequential
                        boundary
gs_spending_combo       Derive spending bound for MaxCombo group
                        sequential boundary
h1                      Initialize numerical integration for group
                        sequential design
hupdate                 Update numerical integration for group
                        sequential design
ppwe                    Piecewise exponential cumulative distribution
                        function
s2pwe                   Approximate survival distribution with
                        piecewise exponential distribution
summary.fixed_design    Summary for fixed design or group sequential
                        design objects
to_integer              Rounds sample size to an even number for equal
                        design
wlr_weight              Weight functions for weighted log-rank test
