Converts an entire "Picture" object, or
a path element thereof,
into an appropriate grid grob. Not usually called directly
by the user; usually called by grid.picture.
symbolize(object, x = unit(0.5, "npc"), y = unit(0.5, "npc"),
size = unit(1, "npc"), units = "npc", ...)A "Picture" object.
A numeric vector or unit object specifying x-values.
A numeric vector or unit object specifying y-values.
A numeric vector or unit object specifying symbol size.
The default units to use if x, y,
or size are specified as simple numeric values.
Arguments passed on to the relevant grid grob constructor function.
A grid gTree (when given a whole "Picture")
or a "symbolFill" or "symbolStroke" object
(when given a single picture path).