Maybe
expand.grid( rep( list( 0:1), 10))
does what you want.
Best regards -- Gerrit
---------------------------------------------------------------------
AOR Dr. Gerrit Eichner Mathematical Institute, Room 305 E
gerrit.eich...@math.uni-giessen.de Justus-Liebig-University Giessen
Tel: +49-(0)641-99-32104 Arndtstr. 2, 35392 Giessen, Germany
Fax: +49-(0)641-99-32109 http://www.uni-giessen.de/~gcb7
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On Tue, 1 Sep 2009,
ted.hard...@manchester.ac.uk wrote:
Greetings all!
I have been searching the Site for a function, say "subsets",
such that for instance
subsets(10)
would return a (say) matrix of indices to the 2^10 subsets of
N items -- perhaps in the form of 2^10 rows each of which is
10 entries each either TRUE or FALSE. Or 1 or 0. Or ...
I can of course write my own, using good old looping technology
or similar, but it would be good to find one which did it quick
and snappy, at the compiled level.
A Site Search in Function on "all subsets" didn't seem to yield
anything of the kind, which surprised me. Maybe I overlooked
something ...
(This is prompted by the recent "OT" discussion on "HT vs. HH",
to which I want to respond later).
With thanks,
Ted.
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E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk>
Fax-to-email: +44 (0)870 094 0861
Date: 01-Sep-09 Time: 09:09:09
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