[BioC] Finding all combinations from groups

[Daniel Brewer]

Hi,

I have five groups (of genes) with each group having different number of
members.  What I need to do is to apply a function to a set that
contains one gene from each group.  I would like to do this for every
possible set.

For example,

Groups
1: 1
2: 5 6 7
3: 2 3

I would like to apply the function to:
1,5,2
1,5,3
1,6,2
1,6,3
1,7,2
1,7,3

This has come up in pathway analysis (gene enrichment analysis) where I
want to look at a number of different isoforms of each gene.

Does anyone know a way to get these combinations?

Thanks

Dan

-- 
**************************************************************

Daniel Brewer, Ph.D.

Institute of Cancer Research
Molecular Carcinogenesis
MUCRC
15 Cotswold Road
Sutton, Surrey SM2 5NG
United Kingdom

Tel: +44 (0) 20 8722 4109
Fax: +44 (0) 20 8722 4141

Email: daniel.brewer at icr.ac.uk

**************************************************************

The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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