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grid.draw(x, recording=TRUE)"grob" or NULL. The grob and gTree methods automatically push any viewports in a
vp slot and automatically apply any gpar settings
in a gp slot. In addition, the gTree method pushes and
ups any viewports in a childrenvp slot and automatically
calls grid.draw for any grobs in a children slot.
The methods for grob and gTree call the generic hook functions
preDrawDetails, drawDetails, and postDrawDetails
to allow classes derived from grob or gTree to perform
additional viewport pushing/popping and produce additional
output beyond the default behaviour for grobs and gTrees.
grob.
grid.newpage()
## Create a graphical object, but don't draw it
l <- linesGrob()
## Draw it
grid.draw(l)
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