[Maxima] Combination function

[Robert Dodier]

On 5/8/10, Iago Tejeda Pérez <iagotp at gmail.com> wrote:

> I was looking for a function that returns the combinations of n elements in
> groups of r.

I think you want powerset(S, r) where S is a set of n elements.

> I only found a function that returns the number of posible combinations(n,r).

For this you want binomial(n, r). There is a function in an add-on
package named combination but it simply punts to binomial:

combination(n,r):=binomial(n,r)$

This is a historical artifact and probably it should be expunged ...

Welcome to Maxima, I hope it is useful to you.

Robert Dodier