Generate null distributions for multiple rank sum statistics — null_dist_multiple • CMRSS

Computes the randomization null distribution for multiple rank sum statistics simultaneously under complete randomization.

Usage

null_dist_multiple(
  n,
  m,
  methods.list = NULL,
  nperm = 10^5,
  Z.perm = NULL,
  chunk_size = 1000
)

Arguments

n: Total number of units.
m: Number of treated units.
methods.list: A list of method specifications.
nperm: Number of permutations.
Z.perm: Optional pre-computed permutation matrix.
chunk_size: Integer chunk size used to generate permutations when Z.perm is NULL. Smaller values use less memory.

Value

An H x nperm matrix where H is the number of statistics.

Examples

set.seed(1)
methods.list <- list(list(name = "Wilcoxon", scale = FALSE),
                     list(name = "Stephenson", s = 3, scale = FALSE))
dim(null_dist_multiple(n = 20, m = 12, methods.list = methods.list,
                       nperm = 500))
#> [1]   2 500