[R] r: LEXICOGRAPHIC ORDERING

[Uwe Ligges]

Clark Allan wrote:
> HI all
> 
> i have a seemingly simple question.
> 
> given a sequence of numbers say, 1,2,3,4,5.
> 
> i would like to get all of the possible two number arrangments
> (combinations), all 3 number arrangents ... 5 number arrangements
> (combinations).
> 
> i.e. 
> 
> in the 2 number case:
> 
> 12,13,14,15,23,24,25,34,35,45

   library(gtools)
   combinations(5, 2) %*% c(10, 1)

Uwe Ligges


> 
> 
> any ideas?
> 
> 
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