| ff {kStatistics} | R Documentation |
Falling factorial
Description
The function computes the descending (falling) factorial of a positive integer n
with respect to a positive integer k less or equal to n.
Usage
ff( n=1, k )
Arguments
n |
integer |
k |
integer |
Details
Run ff(n, k) to get n(n-1)(n-2).....(n-k+1).
Value
integer |
the descending factorial |
Author(s)
Elvira Di Nardo elvira.dinardo@unito.it,
Giuseppe Guarino giuseppe.guarino@rete.basilicata.it
See Also
mkmSet,
countP,
nStirling2,
intPart,
mCoeff
Examples
# Return 6*5*4 = 120
ff(6,3)
[Package kStatistics version 2.1.1 Index]