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% File src/library/base/man/sequence.Rd
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% Part of the R package, http://www.R-project.org
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% Copyright 1995-2007 R Core Team
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% Distributed under GPL 2 or later
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\name{sequence}
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\title{Create A Vector of Sequences}
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\usage{
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sequence(nvec)
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}
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\alias{sequence}
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\arguments{
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  \item{nvec}{a non-negative integer vector each element of which
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    specifies the end point of a sequence.}
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}
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\description{
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  For each element of \code{nvec} the sequence \code{\link{seq_len}(nvec[i])}
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  is created.  These are concatenated and the result returned.
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}
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\details{
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  Earlier versions of \code{sequence} used to work for 0 or negative inputs as
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  \code{seq(x) == 1:x}.
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  Note that \code{sequence <- function(nvec) unlist(lapply(nvec, seq_len))}
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  and it mainly exists in reverence to the very early history of \R.
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}
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\seealso{
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  \code{\link{gl}}, \code{\link{seq}}, \code{\link{rep}}.
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}
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\examples{
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sequence(c(3, 2)) # the concatenated sequences 1:3 and 1:2.
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#> [1] 1 2 3 1 2
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}
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\keyword{manip}