Obtain Permutation Matrix from a Random Assignment Declaration

Obtain Permutation Matrix from a Random Assignment Declaration

obtain_permutation_matrix(declaration, maximum_permutations = 10000)

Arguments

declaration	A random assignment declaration, created by declare_ra.
maximum_permutations	If the number of possible random assignments exceeds maximum_permutations, obtain_permutation_matrix will return a random sample of maximum_permutations permutations. Defaults to 10,000.

Value

a matrix of all possible (or a random sample of all possible) random assignments consistent with a declaration.

Examples

# complete

declaration <- declare_ra(N = 4)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
#> [1] 4 6
obtain_num_permutations(declaration)
#> [1] 6

# blocked

blocks <- c("A", "A", "B", "B", "C", "C", "C")
declaration <- declare_ra(blocks = blocks)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
#> [1]  7 24
obtain_num_permutations(declaration)
#> [1] 24

# clustered

clusters <- c("A", "B", "A", "B", "C", "C", "C")
declaration <- declare_ra(clusters = clusters)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
#> [1] 7 6
obtain_num_permutations(declaration)
#> [1] 6

# large

declaration <- declare_ra(20)
choose(20, 10)
#> [1] 184756
perms <- obtain_permutation_matrix(declaration)
dim(perms)
#> [1]    20 10000