[R] Boundaries of consecutive integers

[Steve Taylor]

How's this:

big.gap = diff(test) > 1
cbind(test[c(TRUE, big.gap)], test[c(big.gap, TRUE)])


-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Lizzy Wilbanks
Sent: Tuesday, 14 May 2013 1:18p
To: r-help at r-project.org
Subject: [R] Boundaries of consecutive integers

Hi folks,

I'm trying to accomplish something that seems like it should be straightforward, but I've gotten tied in knots trying to figure it out.  A toy example of my issue is below.  I've played with diff and can't seem to figure out a systematic solution that will give me the two column output independent of the number of breakpoints in the vector...

test<-c(1:5, 22:29,33:40)
example.output<-matrix(c(1,5,22,29,33,40),nrow=3,ncol=2,byrow=TRUE)


Any ideas?


Thanks!
Lizzy

--
"The obvious goal of any bacterium is to become bacteria."

Lizzy Wilbanks
Graduate Student, Eisen and Facciotti Labs UC Davis, Microbiology Graduate Group

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