[R] Boundaries of consecutive integers

[arun]

May be:
 matrix(c(test[c(TRUE,diff(test)>1)],test[c(which(diff(test)>1),length(test))]),ncol=2)
#     [,1] [,2]
#[1,]    1    5
#[2,]   22   29
#[3,]   33   40
A.K.

----- Original Message -----
From: Lizzy Wilbanks <egwilbanks at ucdavis.edu>
To: r-help at r-project.org
Cc: 
Sent: Monday, May 13, 2013 9:18 PM
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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