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MathGroup Archive 2007

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Re: Combination List

  • To: mathgroup at smc.vnet.net
  • Subject: [mg78060] Re: Combination List
  • From: "Bruno Campanini" <BC at gmail.com>
  • Date: Fri, 22 Jun 2007 06:35:11 -0400 (EDT)
  • References: <f55qci$k58$1@smc.vnet.net> <f58bk7$6ve$1@smc.vnet.net> <f5arsg$9aq$1@smc.vnet.net> <f5dj3m$snm$1@smc.vnet.net>

"Sem" <sarner2006-sem at yahoo.it> wrote in message 
news:f5dj3m$snm$1 at smc.vnet.net...
> Did you mean this:
>
> In[1]:= Tuples[Range[4],3]
> Out[1]=
> {{1,1,1},{1,1,2},{1,1,3},{1,1,4},{1,2,1},{1,2,2},{1,2,3},{1,2,4},{1,3,1},{1,3,
> 
> 2},{1,3,3},{1,3,4},{1,4,1},{1,4,2},{1,4,3},{1,4,4},{2,1,1},{2,1,2},{2,1,
> 
> 3},{2,1,4},{2,2,1},{2,2,2},{2,2,3},{2,2,4},{2,3,1},{2,3,2},{2,3,3},{2,3,
> 
> 4},{2,4,1},{2,4,2},{2,4,3},{2,4,4},{3,1,1},{3,1,2},{3,1,3},{3,1,4},{3,2,
> 
> 1},{3,2,2},{3,2,3},{3,2,4},{3,3,1},{3,3,2},{3,3,3},{3,3,4},{3,4,1},{3,4,
> 
> 2},{3,4,3},{3,4,4},{4,1,1},{4,1,2},{4,1,3},{4,1,4},{4,2,1},{4,2,2},{4,2,
> 
> 3},{4,2,4},{4,3,1},{4,3,2},{4,3,3},{4,3,4},{4,4,1},{4,4,2},{4,4,3},{4,4,
>    4}}
>
> In[2]:= Length[%]
> Out[2]= 64

Not exactly.

Tuples[Range[3],2]  gives:
1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3

I need instead unique values:
1 1
1 2
1 3
2 2
2 3
3 3

Bruno 



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