Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2001
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2001

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

Search the Archive

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 :-)
>
>
>
>
>
>
>
>




  • Prev by Date: Re: Matrix of possible combinations of N elements
  • Next by Date: Re: Fourier: Execution time for real and complex arguments
  • Previous by thread: Re: Matrix of possible combinations of N elements
  • Next by thread: Fit[]: how to obtain the parameter values?