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  heaxadecimal representation (starting with \code{0x} or \code{0X}) can
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  heaxadecimal representation (starting with \code{0x} or \code{0X}) can
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  be converted, as well as any allowed by the platform for real numbers.
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  be converted, as well as any allowed by the platform for real numbers.
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  Like \code{\link{as.vector}} it strips attributes including names.
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  Like \code{\link{as.vector}} it strips attributes including names.
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  \code{is.integer} returns \code{TRUE} or \code{FALSE} depending on
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  \code{is.integer} returns \code{TRUE} or \code{FALSE} depending on
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  whether its argument is of integer type or not.
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  whether its argument is of integer \link{type} or not.
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  \code{is.integer} is generic: you can write methods to handle
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  \code{is.integer} 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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  There is a method for factors which returns \code{FALSE}.
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  There is a method for factors which returns \code{FALSE}.
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  (Prior to \R 2.0.0, there was no such method and for most (but not
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  (Prior to \R 2.0.0, there was no such method and for most (but not
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  all) factors \code{is.integer} returned \code{TRUE}.)
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  all) factors \code{is.integer} returned \code{TRUE}.)