[R] data manipulation help

[Charles C. Berry]

On Tue, 28 Aug 2007, Zheng Lu wrote:

> Dear All:
>
> I have a dataset like
> A=c(0,12,34,5,6,0,4,5,6,0,12,3,4,8,7,0,4,3,5,0,.......),I want to add a
> column to this dataset, it must be in
> B=c(1,1,1,1,1,2,2,2,2,3,3,3,3,3,3,4,4,4,4,5,......), How can I create B
> based on the sequence of A. Appreciate.

Do you want

 	B  <- cumsum( A == 0 )

??

Please use spaces and newlines to make your code more readable!


>
>
> Zheng
>
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Charles C. Berry                            (858) 534-2098
                                             Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	            UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/  La Jolla, San Diego 92093-0901