[R] animated grid graphics

[hadley wickham]

> Ups, I just realized that we have the possibility of using
> grid.remove(..., redraw = FALSE) which is more or less what I was looking for.
>
> But I'm still wondering if its possible to remove a viewport from
> a viewport tree:

I've talked with Paul about this (for the general case of modifying
existing viewports) and my understand is that it's not possible and
would require substantial changes to the underlying code to make it
possible.

Hadley


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