Q: extract all k-tuple from a list of n elements
- To: mathgroup at smc.vnet.net
- Subject: [mg49650] Q: extract all k-tuple from a list of n elements
- From: Klaus Duellmann <klaus.duellmann at arcor.de>
- Date: Mon, 26 Jul 2004 04:01:54 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Question: How can I extract all k-tuple from a list of n elements
(without considering permutations of the k-tuple)?
Example: For the special case k=3 one solution would be
Flatten[Table[{i, j, k}, {i, 1, n - 2}, {j, i + 1, n - 1}, {k, j + 1,
n}], 2];
A generalization of this solution for all k >=1 would involve to create
'automatically' a table of dimension k, but how can this be implemented?
Any help is appreciated.
Regards,
Klaus