[R] repeating values in an index two by two

Federico Calboli f.calboli at imperial.ac.uk
Mon Nov 11 13:11:48 CET 2013

Hi All,

I am trying to create an index that returns something like


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.


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