Re: Matrix of possible combinations of N elements
- To: mathgroup at smc.vnet.net
- Subject: [mg31841] Re: Matrix of possible combinations of N elements
- From: "Allan Hayes" <hay at haystack.demon.co.uk>
- Date: Fri, 7 Dec 2001 05:55:59 -0500 (EST)
- References: <9ul2nj$6mv$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Per,
How about:
Permutations[{A,B,C,D}]
{{A,B,C,D},{A,B,D,C},{A,C,B,D},{A,C,D,B},{A,D,B,C},{A,D,C,B},{B,A,C,D},{B,A,
D,
C},{B,C,A,D},{B,C,D,A},{B,D,A,C},{B,D,C,A},{C,A,B,D},{C,A,D,B},{C,B,A,
D},{C,B,D,A},{C,D,A,B},{C,D,B,A},{D,A,B,C},{D,A,C,B},{D,B,A,C},{D,B,C,
A},{D,C,A,B},{D,C,B,A}}
--
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565
"Per Schjetne" <per.schjetne at dmhuset.no> wrote in message
news:9ul2nj$6mv$1 at smc.vnet.net...
> I have N elements and want to make a matrix of all possible combinations.
> Example:
>
> A, B, C, D -> 4 elements
> Combinations with 2 similar characters are not allowed (AAAA, AABB etc)
> So that gives me 4*3*2*1=24 unique combinations
> I have no problem writing all the combinations down, but I find it hard to
> make a general function/algorithm in VB for generating matrix of any
number
> of elements.
>
> I know this is a common problem and instead of using days on this problem
I
> ask you gurus here!
>
> Per :-)
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