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  same as the standard deviation, but in general it is not.  (To scale
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  same as the standard deviation, but in general it is not.  (To scale
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  by the standard deviations without centering, use
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  by the standard deviations without centering, use
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  \code{scale(x, center = FALSE, scale = apply(x, 2, sd, na.rm = TRUE))}.)
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  \code{scale(x, center = FALSE, scale = apply(x, 2, sd, na.rm = TRUE))}.)
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}
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}
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\references{
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\references{
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  Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
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  \bibshow{R:Becker+Chambers+Wilks:1988}
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  \emph{The New S Language}.
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  Wadsworth & Brooks/Cole.
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}
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}
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\seealso{
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\seealso{
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  \code{\link{sweep}} which allows centering (and scaling) with
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  \code{\link{sweep}} which allows centering (and scaling) with
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  arbitrary statistics.
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  arbitrary statistics.
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