try this:

nams <- c("a", "b", "c", "d")
combn(nams, 2, paste, collapse = " vs. ")


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
      http://www.student.kuleuven.be/~m0390867/dimitris.htm


Quoting Ng Stanley <[EMAIL PROTECTED]>:

> Hi,
>
> Given names <- c("a", "b", "c", "d"). I would like to generate "a vs. b", "a
> vs. c", "a vs. d", "b vs. c", "b vs. d", "c vs. d"
>
> Thanks
>
>       [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> 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.
>
>



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