LPERM Function
Computes the logarithm of the PERM function, which is the logarithm of the number of permutations of n objects, with the option of including r number of elements.
| Categories: | Combinatorial |
| CAS |
Syntax
Required Argument
n
is an integer that represents the total number of elements from which the sample is chosen.
Optional Argument
r
is an optional integer value that represents the number of chosen elements. If r is omitted, the function returns the factorial of n.
| Restriction | r ≤ n |
Details
The LPERM function computes
the logarithm of the PERM function.
Example
The following SAS statements
produce these results:
|
SAS Statement
|
Result
|
|---|---|
|
x=lperm(5000, 500);
put x;
|
4232.7715946
|
|
y=lperm(100, 10);
put y;
|
45.586735935
|
See Also
Functions:
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Last updated: March 16, 2017