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  \emph{The New S Language}.
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  \emph{The New S Language}.
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  Wadsworth & Brooks/Cole.
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  Wadsworth & Brooks/Cole.
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}
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}
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\seealso{\code{\link{seq}}, \code{\link{sort}}.}
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\seealso{\code{\link{seq}}, \code{\link{sort}}.}
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\examples{
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\examples{
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x <- c(1:5,5:3)
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x <- c(1:5, 5:3)
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## sort into descending order; first more efficiently:
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## sort into descending order; first more efficiently:
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stopifnot(sort(x, decreasing = TRUE) == rev(sort(x)))
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stopifnot(sort(x, decreasing = TRUE) == rev(sort(x)))
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stopifnot(rev(1:7) == 7:1)#- don't need 'rev' here
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stopifnot(rev(1:7) == 7:1)  #- don't need 'rev' here
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}
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}
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\keyword{manip}
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\keyword{manip}