R: Obtain the Number of Possible Permutations from a Random...

obtain_num_permutations {randomizr} | R Documentation

## 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)

### Arguments

`declaration` | A random assignment declaration, created by `declare_ra`.

### Value

a scalar

### Examples

    # 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)

[Package randomizr version 0.18.0 Index]