dfactorial {phangorn} | R Documentation |
double factorial function
dfactorial(x) ldfactorial(x)
x |
a numeric skalar or vector |
dfactorial(x)
returns the double factorial, that is x!! = 1 * 3 * 5 * ... * x
and ldfactorial(x)
is the natural logarithm of it.
Klaus Schliep K.P.Schliep@massey.ac.nz
dfactorial(1:10)