
Hi,

First I would like to apologize if this is not the right forum for the
following question. 

I have the following sequence  of ZEROS  and ONES. I would like to ID
each  "package" of  ONES with a unique identifier.

test = c(0,0,0,0,1,1,1,1,0,0,0,1,1,1,1,1,0,0,0,1,1,1,0)

 An example could be the following vector

id
=c(0,0,0,0,1000,1000,1000,1000,0,0,0,2000,2000,2000,2000,2000,0,0,0,3000
,3000,3000,0)

Where all the consecutive ONES have the same ID. I can create the ID
using a loop, but I was wondering if anyone could recommend  another
method. I suspect that something in the area of factors might help, but
I do not know what will be the best approach. Any recommendations will
be highly appreciated.



Jorge Nieves
Phone 212.782.7083
Fax 212.642.7644


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