From jhallman@frb.gov  Tue Apr  3 20:52:46 2001
From: jhallman@frb.gov (jhallman@frb.gov)
Date: Tue, 3 Apr 2001 21:52:46 +0200 (MET DST)
Subject: [Rd] rle() fails with NA's (PR#892)
Message-ID: <200104031952.VAA19642@pubhealth.ku.dk>

Full_Name: Jeff Hallman
Version: 1.2.2
OS: Solaris
Submission from: (NULL) (132.200.32.33)


> rle(c(1, NA, 1)
$lengths
[1] 3

$values
[1] 1

should be as in Splus:

$lengths
[1] 1 1 1

$values
[1] 1 NA 1

The Splus implementation (which works fine in R) is:

rle <- function(x){
 if(!is.atomic(x))
    stop("Argument must have an atomic mode")
  if(length(x) == 0)
    return(list(lengths = numeric(0), values = x))
  if(length(x) == 1)
    return(list(lengths = 1, values = x))
  x.int <- match(x, unique(x))
  ends <- c(diff(x.int) != 0, T)
  list(lengths = diff(c(0, seq(along = x)[ends])), values = x[ends])
}


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[Rd] rle() fails with NA's (PR#892)
jhallman@frb.gov