Represents the randomization procedure Complete Randomization.
Usage
crPar(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
Toss a fair coin N times in case K=2 and assign the treatments according to the result of the coin. In case of K>2, replace the coin by a die with K sides.
Value
S4 object of the class crPar.
References
W. F. Rosenberger and J. M. Lachin (2002) Randomization in Clinical Trials.
Wiley.