logfactorial |
(function for equations) |
Usage: |
logfactorial (n) |
Definition: |
log (n (n – 1) (n – 2) ... 1) |
Required: |
n ⋝ 0 n is an integer |
Returns the natural logarithm of the factorial of n (i.e. n!).
If n is not an integer you may want to use the loggamma function, which for integer values is related to logfactorial by: logfactorial (n) = loggamma (n + 1) but which is also defined for non-integer values.