R help - Oct 2008 - count zero or one in a list

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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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?
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


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

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