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Re: Fastest way to list combinations [message #80811 is a reply to message #80810]

Sun, 15 July 2012 08:23

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On 7/13/12 6:21 PM, antar3s86@gmail.com wrote:
> Hi
>
> I have to solve a problem which includes listing all possible combinations to form a triplet for a given number of objects.
>
> Say you have the objects:
> a,b,c,d,e, so in total 5 which gives you 5!/(2!*3!) = 10 possibilities to list them without any doubles:
>
> abc
> abd
> abe
> acd
> ace
> ade
> bcd
> bce
> bde
> cde
>
> I have solved this problem for any number (well up to some computer limit anyway) in three FOR loops but for large numbers this is rather small...
>
> can you think of a better way than using loops to list all these possibilites?
>
> thanks!!
> :)

You could try COMBIGEN in JBIU.

http://astroconst.org/jbiu/jbiu-doc/math/combigen.html

-Jeremy.

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[Message index]

		Re: Fastest way to list combinations By: antar3s86 on Mon, 16 July 2012 03:12
		Re: Fastest way to list combinations By: Jeremy Bailin on Sun, 15 July 2012 08:23
		Re: Fastest way to list combinations By: Paul Van Delst[1] on Fri, 13 July 2012 14:28
		Re: Fastest way to list combinations By: antar3s86 on Fri, 13 July 2012 14:01

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