[Rd] seekViewport error

[hadley wickham]

> The problem (see also
> https://stat.ethz.ch/pipermail/r-help/2008-January/151655.html) is that
> cellGrobs (children of frame grobs) use their 'vp' component to store
> the viewport that positions them within the parent frame.  This means
> that the viewport is pushed and then popped (as per normal behaviour for
> 'vp' components).

Why ever 'pop' and not 'up'?  It seems like you would (almost) always
want to leave the viewport around so that others can modify more
easily.  Is it a performance consideration?

Hadley


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