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:[EMAIL PROTECTED] UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
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and provide commented, minimal, self-contained, reproducible code.
