CDFOR2LRR               Convert CDF Odds Ratio to Logged Relative Risks
CRRtoRR                 Cumulative-risk ratios to risk ratios
CY2TOShaz               Calender year rates to Study Year Rates
CondPower               Conditional type I and type II error
                        probabilities given current value of the test
                        statistic
DX                      A utility function for forming differences
EX1gXK                  A function for computing the bias adjusted
                        point estimate for a statistic observed to
                        cross the efficacy boundary.
Elements                Create a subset of a "cpd.PwrGSD" object
GrpSeqBnds              Computes efficacy and futility boundaries
Haybittle               The Haybittle method of Boundary Construction
IntSurvDiff             Weighted Integrated Survival function test
LanDemets               The Lan-Demets method of Boundary Construction
ObrienFleming           The O'Brien-Fleming Alpha Spending Function
Pocock                  The Pocock Alpha Spending Function
Pow                     The Wang-Tsiatis Power Alpha Spending Function
Power                   Extract the Power results
PwrGSD                  Calculate Power in a Group Sequential Design
RCM2RR                  Relative cumulative mortality to Relative Risk
RR2RCM                  Relative risk to Relative Cumulative Mortality
SC                      The Stochastic Curtailment method of Boundary
                        Construction
SCtoBdry                Converts a stochastic curtailment boundary
                        (conditional type I or II error probability)
                        into a (efficacy or futility) boundary on the
                        standardized Z scale
SimGSB                  Verifies the results of "GrpSeqBnds" via
                        simulation
agghaz                  Aggregated Hazard
as.boundaries           Convert a "PwrGSD" object to a "boundaries"
                        object
cpd.PwrGSD              Create a skeleton compound PwrGSD object
detail                  Function to extract the 'detail' component from
                        a 'PwrGSD' object
gsd.dens                A function for computing the probability
                        density for the group sequentially monitored
                        test statistic.
lookup                  Lookup values for a piecewise constant function
lung                    Mayo Clinic Lung Cancer Data
mystack                 Stack a dataset
mysurvfit               My Survfit
plot.cpd.PwrGSD         Plot Method for cpd.PwrGSD objects
wtdlogrank              Weighted log-rank test
