Number of partitions

Number of partitions

npartitions(n, k = NULL, distinct = FALSE, bigz = FALSE)

Arguments

n	an non-negative integer to be partitioned
k	number of parts
distinct	an logical to restrict distinct values
bigz	an logical to use gmp::bigz

See also

partitions for generating all partitions and ipartitions for iterating partitions

Examples

# number of partitions of 10
npartitions(10)
#> [1] 42
# number of partitions of 10 into 5 parts
npartitions(10, 5)
#> [1] 7

# integer overflow
if (FALSE) npartitions(160)
npartitions(160, bigz = TRUE)
#> Big Integer ('bigz') :
#> [1] 107438159466

# zero sized partitions
npartitions(0)
#> [1] 1
npartitions(5, 0)
#> [1] 0
npartitions(5, 6)
#> [1] 0
npartitions(0, 0)
#> [1] 1
npartitions(0, 1)
#> [1] 0