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  \item{\dots}{values to be passed into \code{fmt}. Only logical,
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  \item{\dots}{values to be passed into \code{fmt}. Only logical,
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    integer, real and character vectors are accepted, and only the first
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    integer, real and character vectors are accepted, and only the first
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    value is read from each vector.}
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    value is read from each vector.}
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}
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}
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\details{
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\details{
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  This is a wrapper for the system's C call.  Attempts are made to
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  This is a wrapper for the system \code{sprintf} C-library function.  
-
 
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  Attempts are made to
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  check that the mode of the values passed match the format supplied,
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  check that the mode of the values passed match the format supplied,
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  and \R's special values (\code{NA}, \code{Inf}, \code{-Inf} and
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  and \R's special values (\code{NA}, \code{Inf}, \code{-Inf} and
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  \code{NaN}) are handled correctly.
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  \code{NaN}) are handled correctly.
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  The following is abstracted from K&R (see References, below).  The
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  The following is abstracted from K&R (see References, below).  The