RAR.trippa {BATSS}

RAR of Trippa et al. (2012)

Description

define the group allocation probabilities based on the response adaptive randomisation rule of Trippa et al. (2012)

Usage

RAR.trippa(posterior, n, N, ref, active, gamma, eta, nu)

Arguments

posterior

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

n

the 'BATSS' ingredient 'n' corresponding to the vector of number of recruited participants per arm including the control group at the look of interest.

N

the 'BATSS' ingredient '‘N’ corresponding to the maximum (planned) sample size.

ref

the 'BATSS' ingredient 'ref' corresponding to a logical vector of the same length and order as 'prob0' (i.e., number of arms initially included in the study including the reference group)) and indicating which group is the reference one.

active

the 'BATSS' ingredient 'active' corresponding to a logical vector of the same length and order as 'prob0' (i.e., number of arms initially included in the study including the reference group)) and indicating if each arm is active at the look of interest.

gamma

a scaling factor (to be defined in RAR.arm.control).

eta

a scaling factor (to be defined in RAR.arm.control).

nu

a scaling factor (to be defined in RAR.arm.control).

Value

RAR.trippa returns a vector of probabilities with length of active.