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  \bold{This function is deprecated in grid version 0.8 and will be
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  \bold{This function is deprecated in grid version 0.8 and will be
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    made defunct in grid version 1.9}
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    made defunct in grid version 1.9}
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  You should use the \code{convertUnit()} function or one of its
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  You should use the \code{convertUnit()} function or one of its
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  close allies instead.
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  close allies instead.
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  This function returns a numeric vector containing the specified
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  This function returns a numeric vector containing the specified
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  x or y locations or dimensions, converted to "user" or "data"
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  x or y locations or dimensions, converted to "user" or "data"
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  units, relative to the current viewport.
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  units, relative to the current viewport.
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}
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}
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\usage{
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\usage{
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\value{
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\value{
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  A numeric vector.
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  A numeric vector.
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}
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}
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\author{ Paul Murrell }
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\author{ Paul Murrell }
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\section{WARNING }{ If you draw objects based on output from these conversion
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\section{WARNING }{ If you draw objects based on output from these conversion
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    functions, then resize your device, the objects will be drawn
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    functions, then resize your device, the objects will be drawn
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    incorrectly -- the base R display list will not recalculate these
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    incorrectly -- the base R display list will not recalculate these
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    conversions.  This means that you can only rely on the results of
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    conversions.  This means that you can only rely on the results of
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    these calculations if the size of your device is fixed.}
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    these calculations if the size of your device is fixed.}
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\seealso{ \code{\link{grid.convert}}, \code{\link{unit}} }
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\seealso{ \code{\link{grid.convert}}, \code{\link{unit}} }
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\examples{
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\examples{
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grid.newpage()
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grid.newpage()
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pushViewport(viewport(width=unit(.5, "npc"),
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pushViewport(viewport(width=unit(.5, "npc"),