Try this:

rle(y)$len[c(1, length(rle(y)$len))]

On Fri, Oct 24, 2008 at 10:34 AM, gallon li <gallon.li@gmail.com> wrote:

> I have a list of {0,1} values, say
>
> y<-c(0,0,0,1,1,0,0,1,0,1,1,1,1)
>
> I want to compute the first few zeros and the last few ones. So the output
> I
> expect is 3 and 4 for this vector. Is there a fast way to match the numbers
> easily?
>
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>
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>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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