From: Gabor Grothendieck <ggrothendieck_at_gmail.com>

Date: Tue, 11 Mar 2008 11:03:55 -0400

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. Received on Tue 11 Mar 2008 - 15:13:33 GMT

Date: Tue, 11 Mar 2008 11:03:55 -0400

See ?diff and ?which:

*> x <- c(18004, 18005, 18006, 18007, 18008, 18009, 18010, 18011,
*

+ 18012, 18013, 18014, 18017, 18060, 18061, 18062, 18063,
+ 18064, 18065, 18066)

*> diff(which(diff(c(-Inf, x, Inf)) != 1))
*

[1] 11 1 7

*>
*

On Tue, Mar 11, 2008 at 10:37 AM, Ng Stanley <stanleyngkl_at_gmail.com> wrote:

*> Hi,
**>
*

> I have a 3 columns data and need to generate a vector of counts. These

*> counts are the number of rows that are contiguous. It looks easy for manual
**> counting, but to turn it algorithmic really split my head.
**>
**> For example, 11 (i.e. 18004 to 180014), 1 (i.e., 18017), 7 (i.e., 18060 to
**> 18064)
**>
**> 18004 10314568 0.5205757
**> 18005 10333837 0.5135572
**> 18006 10566333 0.5111271
**> 18007 10566624 0.8196611
**> 18008 10566629 0.8172404
**> 18009 10567318 0.8148244
**> 18010 11846564 0.8151912
**> 18011 12308703 0.8151912
**> 18012 12937846 0.6670504
**> 18013 13318038 0.6733384
**> 18014 13657045 0.6656946
**> 18017 16200749 0.6173948
**> 18060 23614276 0.7754780
**> 18061 23676384 0.7781018
**> 18062 23752656 0.7584247
**> 18063 23804792 0.7389500
**> 18064 23917628 0.7197741
**> 18065 24397834 0.7008880
**> 18066 24877926 0.6822831
**>
**> [[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.
**>
*

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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. Received on Tue 11 Mar 2008 - 15:13:33 GMT

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