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}
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}
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\seealso{
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\seealso{
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  \code{\link{abs}}
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  \code{\link{abs}}
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}
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}
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\examples{
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\examples{
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sign(pi) # == 1
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sign(pi)    # == 1
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sign(-2:3)# -1 -1 0 1 1 1
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sign(-2:3)  # -1 -1 0 1 1 1
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}
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}
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\keyword{arith}
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\keyword{arith}
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