ummm, Ista, it's 2^n. Cheers, Bert
Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Wed, Aug 23, 2017 at 8:52 AM, Ista Zahn <istaz...@gmail.com> wrote: > On Wed, Aug 23, 2017 at 11:33 AM, Christofer Bogaso > <bogaso.christo...@gmail.com> wrote: >> Hi again, >> >> I am exploring if R can help me to get all possible combinations of >> members in a group. >> >> Let say I have a group with 5 members : A, B, C, D, E >> >> Now I want to generate all possible unique combinations with all >> possible lengths from that group e.g. >> >> 1st combination : A >> 2nd combination : B >> ..... >> 5th combination : E >> 6th combination : A, B >> 7th combination : B, C >> .... >> last combination: A, B, C, D, E >> >> Ideally, I have a fairly large group so am looking for some >> programmatic way to generate all possible combinations. > > Be careful, the number of combinations grows pretty quickly. You can > calculate the number ahead of time with > > sum(choose(n, 1:n)) > > where n is the number of values in your group. > > --Ista > >> >> Any help will be highly appreciated. >> >> Thanks for your time. >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
