[R] repeating values in an index two by two

[Federico Calboli]

Hi All,

I am trying to create an index that returns something like

1,2,1,2,3,4,3,4,5,6,5,6,7,8,7,8

and so on and so forth until a predetermined value (which is obviously even).  I am trying very hard to avoid for loops or for loops front ends.

I'd be obliged if anybody could offer a suggestion.

BW

F
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