[R] Sequence generation

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 29.08.2009 21:49:54:

> On Sat, Aug 29, 2009 at 8:14 PM, njhuang86<njhuang86 at yahoo.com> wrote:
> >
> > Hey guys,
> >
> > I was wondering how to create this sequence: 1, 2, 3, 1, 2, 3, 1, 2, 
3, 1,
> > 2, 3... with the '1, 2, 3' repeated over 10 times.
> 
> rep(1:3,10)  # rep repeats its first argument according to the number
> in its second argument
> 
> > Also, is there a simple method to generate 1, 1, 1, 2, 2, 2, 3, 3, 3?
> 
>  The second argument can be a vector, so what you want here is:
> 
>  rep(1:3,c(3,3,3))

or

rep(1:10,each=3)
 [1]  1  1  1  2  2  2  3  3  3  4  4  4  5  5  5  6  6  6  7  7  7  8  8 
8  9  9  9 10 10 10

Regards
Petr


> 
>  but you can create the second vector here also using rep! Hence:
> 
>  rep(1:3,rep(3,3))
> 
> Barry
> 
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