[R] determine length of sequence of equal elements in a vector

Jannis bt_jannis at yahoo.de
Sat Dec 18 18:21:01 CET 2010

Dear list members,

I am seeking a function that returns me the length of a continous 
sequence of identical elements in a vector. Something like (or similar to):

example = c(1,1,1,2,2,3,3,3,3)

result = c(3,3,3,2,2,4,4,4,4)

I am quite sure there already exists a function to do this, I just cant 
figure out its name. Otherwise I would start programming my own function.


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