R help - Mar 2012 - Calculating length of consecutive sequences within a vector

Hi all,

I have a nx1 logical array of zeros and ones and I want to calculate the
individual lengths of all 1-consecutive sequences contained in it. Is there an
easy quick way to do this in R? So, if I have a vector such as

111001101000011111110

I would like to get (1) 3, (2) 2, (3) 1, (4) 7

Any help would be appreciated! thanks!

Jorge

	[[alternative HTML version deleted]]

rle should get you started.

Michael

On Thu, Mar 8, 2012 at 9:35 AM, Jorge Molinos <JGARCIAM at tcd.ie>
wrote:
> Hi all,
>
> I have a nx1 logical array of zeros and ones and I want to calculate the
individual lengths of all 1-consecutive sequences contained in it. Is there an
easy quick way to do this in R? So, if I have a vector such as
>
> 111001101000011111110
>
> I would like to get (1) 3, (2) 2, (3) 1, (4) 7
>
> Any help would be appreciated! thanks!
>
> Jorge
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

?rle

If your "vector" is as shown, you'll need to split it into its
component elements
first, possibly with strsplit().

If you use dput() or some other means of providing a reproducible example,
someone might be inclined to offer you actual code.

Sarah

On Thu, Mar 8, 2012 at 9:35 AM, Jorge Molinos <JGARCIAM at tcd.ie>
wrote:
> Hi all,
>
> I have a nx1 logical array of zeros and ones and I want to calculate the
individual lengths of all 1-consecutive sequences contained in it. Is there an
easy quick way to do this in R? So, if I have a vector such as
>
> 111001101000011111110
>
> I would like to get (1) 3, (2) 2, (3) 1, (4) 7
>
> Any help would be appreciated! thanks!
>
> Jorge
>
-- 
Sarah Goslee
http://www.functionaldiversity.org

Thanks, rle is what I was looking for.

Jorge



________________________________________
From: R. Michael Weylandt [michael.weylandt at gmail.com]
Sent: 08 March 2012 16:29
To: Jorge Molinos
Cc: r-help at R-project.org
Subject: Re: [R] Calculating length of consecutive sequences within a vector

rle should get you started.

Michael

On Thu, Mar 8, 2012 at 9:35 AM, Jorge Molinos <JGARCIAM at tcd.ie>
wrote:
> Hi all,
>
> I have a nx1 logical array of zeros and ones and I want to calculate the
individual lengths of all 1-consecutive sequences contained in it. Is there an
easy quick way to do this in R? So, if I have a vector such as
>
> 111001101000011111110
>
> I would like to get (1) 3, (2) 2, (3) 1, (4) 7
>
> Any help would be appreciated! thanks!
>
> Jorge
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.