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    \item{\code{"cicero"}}{Cicero.  1 cc = 12 dd.}
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    \item{\code{"cicero"}}{Cicero.  1 cc = 12 dd.}
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    \item{\code{"scaledpts"}}{Scaled Points.  65536 sp = 1 pt.}
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    \item{\code{"scaledpts"}}{Scaled Points.  65536 sp = 1 pt.}
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    \item{\code{"lines"}}{Lines of text.  Locations and dimensions
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    \item{\code{"lines"}}{Lines of text.  Locations and dimensions
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      are in terms of multiples of the default text size of the viewport
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      are in terms of multiples of the default text size of the viewport
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      (as specified by the viewport's \code{fontsize} and \code{lineheight}).}
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      (as specified by the viewport's \code{fontsize} and \code{lineheight}).}
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    \item{\code{"mylines"}}{Same as \code{"lines"}, except will be
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      influenced by grob's own gpar settings.}
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    \item{\code{"char"}}{Multiples of nominal font height of the
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    \item{\code{"char"}}{Multiples of nominal font height of the
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      viewport (as specified by the viewport's \code{fontsize}).}
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      viewport (as specified by the viewport's \code{fontsize}).}
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    \item{\code{"mychar"}}{Same as \code{"char"}, except will be
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      influenced by grob's own gpar settings.}
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    \item{\code{"native"}}{Locations and dimensions are relative to
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    \item{\code{"native"}}{Locations and dimensions are relative to
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      the viewport's \code{xscale} and \code{yscale}.}
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      the viewport's \code{xscale} and \code{yscale}.}
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    \item{\code{"snpc"}}{Square Normalised Parent Coordinates.
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    \item{\code{"snpc"}}{Square Normalised Parent Coordinates.
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      Same as Normalised Parent Coordinates, except gives the same answer for
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      Same as Normalised Parent Coordinates, except gives the same answer for
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      horizontal and vertical locations/dimensions.  It uses the
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      horizontal and vertical locations/dimensions.  It uses the
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  There is also a special function \code{unit.c} for concatenating
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  There is also a special function \code{unit.c} for concatenating
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  several unit objects.
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  several unit objects.
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  The \code{c} function will not give the right answer.
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  The \code{c} function will not give the right answer.
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  There used to be \code{"mylines"}, \code{"mychar"}, \code{"mystrwidth"},
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  \code{"mystrheight"} units.  These will still be accepted, but
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  work exactly the same as
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  \code{"lines"}, \code{"char"}, \code{"strwidth"},
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  \code{"strheight"}.
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}
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}
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\value{
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\value{
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  An object of class \code{"unit"}.
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  An object of class \code{"unit"}.
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}
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}
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\author{Paul Murrell}
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\author{Paul Murrell}