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\description{
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\description{
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  Creates a gTree object from the current grid display list
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  Creates a gTree object from the current grid display list
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  or from a scene generated by user-specified code.
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  or from a scene generated by user-specified code.
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}
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}
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\usage{
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\usage{
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grid.grab(warn = 2, wrap = FALSE, wrap.grobs = FALSE, ...)
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grid.grab(warn = 2, wrap = wrap.grobs, wrap.grobs = FALSE, ...)
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grid.grabExpr(expr, warn = 2, wrap = FALSE, wrap.grobs = FALSE,
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grid.grabExpr(expr, warn = 2, wrap = wrap.grobs, wrap.grobs = FALSE,
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              width = 7, height = 7, device = offscreen, ...)
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              width = 7, height = 7, device = offscreen, ...)
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}
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}
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\arguments{
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\arguments{
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  \item{expr}{ An expression to be evaluated.  Typically,
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  \item{expr}{ An expression to be evaluated.  Typically,
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    some calls to grid drawing functions. }
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    some calls to grid drawing functions. }