rarPar {randomizeR}

Representing Random Allocation Rule

Description

Represents the randomization procedure Random Allocation Rule.

Usage

rarPar(N, K = 2, ratio = rep(1, K), groups = LETTERS[1:K])

Arguments

N

integer for the total sample size of the trial.

K

number of treatment groups (e.g. K=2 if we compare one experimental against one control treatment).

ratio

vector of length K. The total sample number N and all used block lengths (bc) have to be divisible by sum(ratio).

groups

character vector of labels for the different treatments.

Details

Fix a total sample size N the number of treatment groups K, and the vector of the ratio. Afterwards, all patients are assigned according to the ratio to the corresponding treatment groups. All randomization sequences are equiprobable.

Value

S4 object of the class rarPar.

References

W. F. Rosenberger and J. M. Lachin (2002) Randomization in Clinical Trials. Wiley.

See Also

Other randomization procedures: abcdPar, bbcdPar, bsdPar, chenPar, crPar, createParam(), ebcPar, gbcdPar, hadaPar, mpPar, pbrPar, rpbrPar, rtbdPar, tbdPar, udPar