[R] Getting all possible combinations

[Ista Zahn]

On Wed, Aug 23, 2017 at 11:33 AM, Christofer Bogaso
<bogaso.christofer at gmail.com> wrote:
> Hi again,
>
> I am exploring if R can help me to get all possible combinations of
> members in a group.
>
> Let say I have a group with 5 members : A, B, C, D, E
>
> Now I want to generate all possible unique combinations with all
> possible lengths from that group e.g.
>
> 1st combination : A
> 2nd combination : B
> .....
> 5th combination : E
> 6th combination : A, B
> 7th combination : B, C
> ....
> last combination: A, B, C, D, E
>
> Ideally, I have a fairly large group so am looking for some
> programmatic way to generate all possible combinations.

Be careful, the number of combinations grows pretty quickly. You can
calculate the number ahead of time with

sum(choose(n, 1:n))

where n is the number of values in your group.

--Ista

>
> Any help will be highly appreciated.
>
> Thanks for your time.
>
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