randomizr (version 1.0.0)

obtain_num_permutations: Obtain the Number of Possible Permutations from a Random Assignment Declaration

Description

Obtain the Number of Possible Permutations from a Random Assignment Declaration

Usage

obtain_num_permutations(declaration)

Value

a scalar

Arguments

declaration

A random assignment or sampling declaration, created by declare_ra or declare_rs.

Examples

# Random assignment
## complete

declaration <- declare_ra(N = 4)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## blocked

blocks <- c("A", "A", "B", "B", "C", "C", "C")
declaration <- declare_ra(blocks = blocks)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## clustered

clusters <- c("A", "B", "A", "B", "C", "C", "C")
declaration <- declare_ra(clusters = clusters)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## large

declaration <- declare_ra(20)
choose(20, 10)
perms <- obtain_permutation_matrix(declaration)
dim(perms)

# Random sampling
## complete

declaration <- declare_rs(N = 4)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## stratified

strata <- c("A", "A", "B", "B", "C", "C", "C")
declaration <- declare_rs(strata = strata)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## clustered

clusters <- c("A", "B", "A", "B", "C", "C", "C")
declaration <- declare_rs(clusters = clusters)
perms <- obtain_permutation_matrix(declaration)
dim(perms)
obtain_num_permutations(declaration)

## large

declaration <- declare_rs(N = 20)
perms <- obtain_permutation_matrix(declaration)
dim(perms)