bell {salso}

Compute the Bell Number

Description

These functions compute the Bell number (the number of partitions of a given number of items) or its natural logarithm.

Usage

bell(nItems)

lbell(nItems)

Arguments

nItems

The size of the set {1, 2, ..., n}.

Value

A numeric vector of length one giving the Bell number or its natural logarithm.

Examples

# R_CARGO \dontrun{
# R_CARGO # Example disabled since Cargo was not found when installing from source package.
# R_CARGO # You can still run the example if you install Cargo. Hint: cargo::install().
bell(12)
lbell(300)
all.equal( bell(5), exp(lbell(5)) )
# R_CARGO }