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  \code{\link{dimnames}} if \code{x} has \code{\link{names}}.
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  \code{\link{dimnames}} if \code{x} has \code{\link{names}}.
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  The sole purpose of this is to make it possible to access the
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  The sole purpose of this is to make it possible to access the
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  \code{dim}[names] attribute at a later time.
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  \code{dim}[names] attribute at a later time.
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  \code{is.array} returns \code{TRUE} or \code{FALSE} depending on
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  \code{is.array} returns \code{TRUE} or \code{FALSE} depending on
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  whether its argument is an array (i.e., has a \code{dim} attribute)
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  whether its argument is an array (i.e., has a \code{dim} attribute of
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  or not. It is generic: you can write methods to handle
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  positive length) or not.  It is generic: you can write methods to handle
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  specific classes of objects, see \link{InternalMethods}.
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  specific classes of objects, see \link{InternalMethods}.
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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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  Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988)
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  \emph{The New S Language}.
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  \emph{The New S Language}.