asOBF {GroupSeq}R Documentation

approximates O'Brien and Fleming-type

Description

This alpha spending function approximates alphaStar-function O'Brien and Fleming-type.

Usage

asOBF(alpha, tk, OneOrTwoSidedBounds)

Arguments

alpha is the desired overall size.
tk is current point of time
OneOrTwoSidedBounds One-('OneOrTwoSidedBounds'==1) or Two-sided bounds('OneOrTwoSidedBounds'==2) are used

Value

see description

Note

This function is meant to be called in context of using groupseq

Author(s)

Roman Pahl

See Also

groupseq, alphaByUseFunction, asPowerFamily asHSdeCani, asPocock

Examples

##simple example with result: [1] 0.2578086
asOBF(0.05,3,1)

[Package GroupSeq version 1.0 Index]