typeIerr {AGSDest} | R Documentation |
typeIerr
is a function that computes the type I error rate of a GSD.
typeIerr(GSD)
GSD |
object of the class GSTobj or list with the following elements: K = number of stages,
a = vector with futility boundaries (not supported yet), b = rejection boundaries, t = vector with information fractions; see example blow. |
typeIerr
returns the type I error rate of a GSD.
Niklas Hack niklas.hack@meduniwien.ac.at and Werner Brannath werner.brannath@meduniwien.ac.at
O'Brien, PC, Fleming, TR (1979) ''A multiple testing procedure for clinical trials'', Biometrics, 35 , 549-556
Schoenfeld, D (2001) ''A simple Algorithm for Designing Group Sequential Clinical Trials'', Biometrics, 27, 972-974
##The following calculates the type I error rate of a GSD. GSD<-list(K=4,a=rep(-8,4),b=c(4.333,2.963,2.359,2.014), t=c(0.25,0.5,0.75,1),Imax=0.22) typeIerr(GSD)