computeMHPBoundaries {ASSISTant}

Compute the three modified Haybittle-Peto boundaries

Description

Compute the three modified Haybittle-Peto boundaries

Usage

computeMHPBoundaries(prevalence, N, alpha, beta, eps, futilityOnly = FALSE)

Arguments

prevalence

the vector of prevalences between 0 and 1 summing to 1. J, the number of groups, is implicitly the length of this vector and should be at least 2.

N

a three-vector of total sample size at each stage

alpha

the type I error

beta

the type II error

eps

the fraction (between 0 and 1) of the type 1 error to spend in the interim stages 1 and 2

futilityOnly

a logical value indicating only the futility boundary is to be computed; default FALSE

Value

a named vector of three values containing \tilde{b}, b, c