MathGroup Archive 2001

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Combinations

  • To: mathgroup at
  • Subject: [mg30784] Re: [mg30769] Combinations
  • From: BobHanlon at
  • Date: Wed, 19 Sep 2001 00:16:23 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

In a message dated 2001/9/9 8:59:25 PM, ng_only at writes:

>I have Mathematica 4.1
>In a Program like Excel, or a hand-held calculator, one can return the
>number of combinations and permutations.
>However, I can not find an equivalent function in Mathematica.
>For example, Permutations[ ] returns a long list of all the "Actual"
>I am looking for just the final number.
>If there is one, could you include 'how' you found it.  I have looked
>I know DiscreteMath`Combinatorica` has some stuff in it, but the Help system
>appears not to explain many of them.
>I can write a custom function, but I am curious to find out if this function
>is built in to Mathematica.
>I hope the answer is not to take the Length[ ]  of a rather long list.

The functions for number of permuations and combinations are called Factorial 
and Binomial.

Bob Hanlon
Chantilly, VA  USA

  • Prev by Date: Re: comma delimited files for input?
  • Next by Date: Cheating Multiple Point Attractors into Existence
  • Previous by thread: Re: Combinations
  • Next by thread: Re: Combinations