[Rd] possible bug in co.intervals when overlap=0

Benjamin Tyner btyner at stat.purdue.edu
Sat Dec 16 00:34:57 CET 2006


I apologize if this is just a misunderstanding on my part, but I was 
under the impression that the intervals returned by co.intervals should 
cover all the observations. Yet

x<-1:10
z<-co.intervals(x,overlap=0)

In R, z equals
      [,1] [,2]
[1,]  0.5  1.5
[2,]  2.5  3.5
[3,]  3.5  4.5
[4,]  5.5  6.5
[5,]  7.5  8.5
[6,]  8.5  9.5

Note in particular the second and last element of x are not covered by 
any of the intervals. In fact S-PLUS gives
     [,1] [,2]
[1,]    1    2
[2,]    3    3
[3,]    4    5
[4,]    6    7
[5,]    8    8
[6,]    9   10


Ben



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