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Re: Removing 0's

To: Bert Jacobs <b.jacobs@pandora.be>
Subject: Re: Removing 0's
From: "Richard M. Heiberger" <rmh@temple.edu>
Date: Mon, 21 Nov 2005 07:52:07 -0500
Cc: s-news@lists.biostat.wustl.edu
tmp <- c(0,0,12,15,16,0,0,18,4,3,2,0,0)

middle <- function(x) {
  x0 <- (x == 0)
  not0 <- !cumprod(x0) & !rev(cumprod(rev(x0)))
  x[not0]
}

middle(tmp)

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