Computes all possible combinations of n objects taken k at a time.

Combinations(n, k)

## Arguments

n

a number.

k

a number less than or equal to n.

## Value

Returns a matrix containing the possible combinations of nobjects taken k at a time.

SRS

## Examples


Combinations(5,2)
#>   [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
#>      1    1    2    1    2    3    1    2    3     4
#> N    2    3    3    4    4    4    5    5    5     5
# The columns in the matrix list the values of the 10 possible
# combinations of 5 things taken 2 at a time.