ncombinations {arrangements} | R Documentation |
Number of combinations
ncombinations(x = NULL, k = NULL, n = NULL, v = NULL, freq = NULL, replace = FALSE, bigz = FALSE)
x |
an integer or a vector, will be treated as |
k |
an integer, the number of items drawn, defaults to |
n |
an integer, the total number of items, its value may be implicitly deduced from |
v |
a vector to be drawn, defaults to |
freq |
an integer vector of item repeat frequencies |
replace |
an logical to draw items with replacement |
bigz |
an logical to use gmp::bigz |
combinations for generating all combinations and icombinations for iterating combinations
ncombinations(5, 2) ncombinations(LETTERS, k = 5) # integer overflow ## Not run: ncombinations(40, 15) ncombinations(40, 15, bigz = TRUE) # number of combinations of `c("a", "b", "b")` # they are `c("a", "b")` and `c("b", "b")` ncombinations(k = 2, freq = c(1, 2)) # zero sized combinations ncombinations(5, 0) ncombinations(5, 6) ncombinations(0, 1) ncombinations(0, 0)