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Topic: nchoosek all pairwise combinations
Replies: 10   Last Post: Nov 27, 2012 7:46 AM

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Nasser Abbasi

Posts: 5,647
Registered: 2/7/05
Re: nchoosek all pairwise combinations
Posted: Nov 27, 2012 1:16 AM
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On 11/26/2012 10:12 PM, Jerry wrote:
> Hello,
>
> There is a vector
>
> A=['a', 'b', 'c', 'd','e']
>
> I would like to make a square matrix of all paiwise interactions of this vector:
>
>
> a b c d e
> a aa ba ca da ea
> b ab bb cb db eb
> c ac bc cc dc ec
> d ad bd cd dd ed
> e ae bd ce de ee
>
> However, nchoosek allow me to create only half of this matrix.
>Is there any function to make all these possible interactions within "A"?
>


Much easier to do this when your 'a','b', etc... are numerics, not
chars or strings.

What is the reason of using strings for this?
--Nasser



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