eff.arm.simple {BATSS}

Simple arm efficacy stop

Description

allows stopping an arm for efficacy at a given look when the probability of the corresponding target parameter being greater or smaller (depending on the argument 'alternative' of batss.glm) than delta.eff is greater than a fixed value b.

Usage

eff.arm.simple(posterior, b)

Arguments

posterior

the 'BATSS' ingredient 'posterior' corresponding, in this context, to the (posterior) probability of the target parameter being greater or smaller (depending on the argument 'alternative' of batss.glm) than 'delta.eff'.

b

the cut-off value used to declare efficacy (to be defined in eff.arm.control).

Value

eff.arm.simple returns a logical constant.