[R] count sequence of integers

[Roger Bivand]

On Thu, 15 Feb 2007, Samuel Kemp wrote:

> Hi,
> 
> I would like to be able to count a sequence of numbers. For example, given a
> vector of the following integers
> 
> (1,1,1,2,2,2,2,3,3,3,3,3,3,1,1,1,1, 3,3)
> 
> the function would return
> 
> (3, 4, 6, 4,2)

?rle

> x <- c(1,1,1,2,2,2,2,3,3,3,3,3,3,1,1,1,1, 3,3)
> rle(x)$lengths
[1] 3 4 6 4 2

> 
> Does anyone have any cool ideas to solve this?
> 
> Any help appreciated.
> 
> Regards,
> 
> Sam.
> 
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> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no